This trick worked a treat- in front of 12 seventeen year olds and a science teacher. We have been doing about water cohesion theory is biology, and I thought that it was the perfect oppertunity to crack out the pseudoscience with the Red Bull can. Casually filled it up and filled it over, explaining that the special properties of water allowed it to stay sealed inside the can even when it was clearly open. Everyone completely fell for it and even the science teacher swallowed it hook line and sinker. When someone else tried to repeat it, they got a can full of water down their arm for their troubles. It was beautiful. I believe this makes it Scam school 1, UK education system 0!