If (like your writer) you're a Manchester United fan, you'll be well aware that most summer transfers don't just happen overnight. In fact, many seem to drag on for what feels like an eternity, with clubs, agents and players all trying to make sure they get the best deal possible before the dotted line is signed.
This drawn out process often means that a large number of deals can be seen coming a mile off.
However, over the years there have been a few unexpected transfers which seemingly popped up out of the blue and proved that just about anything can happen in the barmy world of professional football.
Ageing superstars of days gone by, highly rated next big things and even some of the most famous and successful people to ever play the beautiful game have all found themselves at the centre of a move which came completely out of nowhere for a number of reasons.
It isn't over till transfer deadline day finishes, so there's a good chance even more players could be added to this list over the coming weeks. But, as of this moment, you'll have a job finding any summer transfers that were more surprising than this lot.