try doing this if you are really bored...

grab a straw.
suck on it... you get air
submerge the other end in some water.... (or beer) you get water (or beer)... at which point your engine hydrolocked and you are screwed.
cut a little hole halfway up the straw
suck on it, you get air
submerge the other end back in your drink
suck on it.
if you dont suck on it really hard, you will just get air.
When water reached the bypass, the air just continues to flow in through the bypass filter and the water (or beer) stays below.
If you suck really hard enough (reving really high), you might get some water through... but then again theres no reason to be reving high if you are driving in rain and puddles.


maybe I'm the bored one that just thought of that little experiment. lol