Stifler’s Science Fail

So, a listener shot me a video showing a guy doing a funny experiment where you do the old coke and Mentos thing, but you put a condom on top to capture all the escaping air/coke. The result should be a giant explosion. Well, I apparently suck at science.

Where did I go wrong? Zip tie? Tiny coke? Too many mentos? Excessive panchos? Not enough sun glasses?