the thing to do with bong water is get your friends little bro and tell him that its really mushroom tea (boil some water in the kitchen to warm it up. then after he drinks it make hime smoke for like 20 min straight when he feels bubble gutz convince him hes shroomin andget creative
heres what you do...take a huge rip..then chug the bong water then exhale lol..might be gross but you will get some props..never personally done it tho. and chicken grease.
i'm usually pretty open about these myths, but come on. just smell it. and think about it. why are you filtering your smoke thru water. because there is a bunch of nasty stuff in there. this one is definately common sense.