If watching Psycho turned your stomach, stay away from this video!
A dad with a wicked sense of humour decided to interrupt his teenage son, happily caterwauling in the shower, by 'invading' the bathroom dressed up in a terrifying gas mask.
"Dad!" he shouts, oh-so-foolishly presuming that this is an accidental intrusion. His face when he angrily confronts what turns out to be a sinister masked storm trooper is priceless - not to mention his yelp of terror as he (sensibly, we think) hits the decks.
Hopefully, the lad forgave his dad for the hair-raising prank (and for putting it on YouTube!).