You might say it was a desperate attempt from a manager who knew the game was up, or some might argue that it was worth a shot from Mourinho - but his attempts at how he tried to improve morale in the Chelsea squad, before he was sacked.
Mourimho oversaw a terrible season for Chelsea, which saw the Premier League champions suffer nine losses before Christmas to send the Blues down the table to 16th. The atmosphere wasn't festive around Chelsea, and Mourinho was taking to criticising his players publicly in press conferences and interviews. That doesn't mean that he didn't try to take the heat out of things in training.
Someone in the Chelsea staff told the Sun:
He would walk around the training ground and when no-one was watching he would pick up handfuls of acorns off the grass and stuff them in his pockets.
Then someone would suddenly get hit on the head by a flying acorn. It was the same with backroom staff. They would be at their desks and then get hit by a nut, look around and there was Jose walking away laughing.
I can't imagine I'd appreciate my boss throwing acorns, or anything for that matter, at my head. Ultimately it failed to work for Mourinho, and the Special One departs Stamford Bridge for the second time.