A couple of summers ago a few friends and I decided to take a trip to North Wales for some mountain biking. For those of you that don't know, northern Wales is quite hilly and has a lot of windy-twisty roads, accompanied by steep drops into the valley below.

On the Saturday afternoon we were driving back from our day's activities, and due to the fact that I wasn't feeling too great (must have been a dirty glass or something from the previous night) I was catching some sleep in the back as we winded our way through the twisty roads and steep valleys of the Welsh countryside.

My 'comedy' acquaintances came up with a rather evil plan. After ensuring there was no traffic nearby the driver slammed on the anchors whilst the other passenger screamed...

It was, quite possibly the worst half second of my life; from waking up until realising that I wasn't about to spend the remaining 30 seconds of my life listening to my mate screaming as we plunged down a steep slope to our deaths. It was a most unpleasant experience.

Nonetheless the two pranksters thought that both they, and their gag, were hilarious.