mix Moutain Dew and Coke Zero and drink it.
Similar to the mentos and coke. Put as many lifesavers mints (polo mints if u live in the UK) then chug some coke!
get a pint glass and fill it half with coke and then the rest of it with soy milk then give it a good old mix! then chug that bad boy!!
Get a 2 liter of Diet Coke and pour out about one third of it and drop a full pack of Mentos in there as fast as possible... and RUN!!! (Do this outside)