But once the dust has settled, the fun really starts: that's when the finger pointing and accusations begin over the moves that failed - and even sometimes over the moves that didn't.
Peterborough, for example, have branded Nottingham Forest's owners as "a disgrace to the game" over their handling of George Boyd's proposed move to the City Ground.
Boyd arrived at Forest on Thursday morning but the transfer collapsed at the 11th hour over what Peterborough described on their official website as an "inconclusive eye test". The two clubs had agreed a fee and personal terms had been agreed with Boyd, who had a loan spell with the Reds towards the end of the 2009/10 season.
Peterborough's director of football Barry Fry laid the blame firmly at the door of the Al-Hasawi family, and he said: "(Forest boss) Alex (McLeish) has been a gentleman over this, it was the owners who pulled out and they are a disgrace to the game. I don't know how they can call themselves fit and proper."
It is understood that McLeish still wanted to press ahead with a permanent transfer but the club's owners, the Al-Hasawi family, were willing only to sanction a loan deal.
Fry added: "I can't understand why they called it off 12 hours after his medical and after Alex spent three weeks trying to get the player.
"We've never had any problems with George and he's in bits. Alex still wanted to do the deal but the owners said no. Alex has been having rows with them for a couple of days about transfer targets. I wouldn't be surprised if he walked over this."
Rumours did circulate on Thursday night that McLeish was so furious with the lack of transfer activity at the City Ground that he had resigned, but McLeish has since denied he had fallen out with Forest chairman Fawaz Al-Hasawi.
A statement from McLeish on Forest's official website read: "Fawaz is a strong individual, he is the owner and isn't a successful businessman for no reason.
"Sometimes he will say no to my requests and suggestions and sometimes I will say no to his because I am a strong manager.
"If that's the level of the alleged 'bust-up' then I guess we'll be reading about more managers having them with their owners this week."
Things were even more fraught at West Brom on Friday morning when Peter Odemwingie turned up for training less than 12 hours after his bizarre efforts to force a move to QPR.
The 31-year-old striker had been a target of QPR throughout January and had repeatedly voiced his displeasure at not being allowed to leave. However, when he drove to London and addressed a media scrum talking about a move to Rangers, it appeared a deal was on the table.
But Albion quickly released a statement saying Odemwingie was there without permission and QPR confirmed it, saying they had stopped him from getting into their Loftus Road ground.
That left Odemwingie sitting in the car park at Loftus Road, unable to even get into the club to discuss terms... and ultimately returning to the Midlands with his tail between his legs.
The player was reportedly sent straight home after turning up at West Brom's training ground on Friday - a move which echoed the infamous Seinfeld episode in which George Costanza turns up at his job on Monday and pretends that nothing happened despite having resigned in fury the previous week.
Odemwingie admitted that he regretted his actions, and that he is "a very emotional person who sometimes doesn't think.
"I understand I have to honour any contract but the club know I have wanted to leave for some time now," he added.
"They feel I can overcome that but they are not the ones who know their own heart. They believe while I am struggling I can keep performing on the pitch."
It was Serie A that saw the strangest failed move, however, when Pajtim Kasami's proposed move from Fulham to Pescara fell through because of a dodgy internet connection.
The Swiss midfielder was set to complete a move to the Italian club before the window closed on Thursday but his international clearance papers did not go through on time due to a failed wi-fi connection at a Milan hotel.
Kasimi, who signed for Fulham in 2011, has made just eight appearances for the Cottagers.
The 20-year-old's agent Mino Raiola was left fuming by the mishap and pointed the finger of blame at the earlier closing of the transfer window in Italy.
"It's ridiculous that the internet connection has not been working correctly," Raiola told Sky Italia.
"We completed all the documents before the deadline but we don't know if they arrived in time.
"It was set up for transportation via the internet and the documents were compiled and sent for Kasami to Pescara and we insist in repeating that everything was done in the right way.
"We hope that the league will give consent to this transfer and why, for example, does abroad close late and we do not? This is bad for the Italian transfer market and the rules should be changed."
Sometimes, though, clubs would give anything for a move to have fallen through: Oxford United's fans have been decidedly uneasy that their club have signed free agent goalkeeper Luke McCormick.
McCormick - known simply as "death crash goalie" by the tabloids - was only released from prison after serving four-years behind bars for a car crash in 2008 in which he killed two children.
The 29-year-old, who had been drinking at the time of his crash, got back into the game with non-league Truro last year and is now back in the paid ranks.