http://youtu.be/xyNL0yL0Q-g
It was this builder’s first day on the job, so his veteran colleagues decided to have a bit of fun by playing one of the oldest tricks in the book…
If a builder ever asks you to hold a bag of plaster or cement mix over your head, then make sure you don’t. It’s quite possibly the oldest prank in the ‘Builder’s Guide to Workplace Pranks’ handbook and yet we see someone falling for it time and time again.
The new guy in question was obviously trying to impress his fellow builders and the fact that he still has a smoke in his mouth as he lifts the bag suggests he was fairly confident in his bag lifting abilities. Mistake no.2.
However, as soon as the bag is lifted above his head a cheeky co-work creeps up behind the bloke and slits the middle of the bag causing the contents to come pouring out all over the new guy and his freshly gelled hair.
Hate that... 
