It's a task previously taken on by the likes of Manchester United, Chelsea and, er, St Johnstone’s youth team – and now that list has been bolstered.
The remit is simple: each player must head the ball down the line, before the final man nods into a (presumably empty) bin to complete the party trick.
And just look what it means to these Cruz Azul players...
The move starts at 0:50
Actually, it may well have been more than the match they were preparing for – the Mexican giants drew 0-0 with Albrijes, from the division below.
‘Milan didn’t collapse against Liverpool in Istanbul. We lost focus for six minutes – for the other 114, we played an extraordinary, beautiful game’: AC legend claims they were 'extraordinary' against Reds in 2005 Champions League final
‘Charlton could have qualified for Europe, but selling Scott Parker to Chelsea made the difference. The manager didn’t want him to go and there was a disagreement’: Former Addicks star highlights key reason why they failed to maintain 2003/04 form
