would probably ask where the soda fountain is

i'd make the guards realise they're gay for each other

I would ratio them on twitter

hey what color is the sky also which door leads to hell

Heard of something similar in the past, but it was just one guard.. this is a classic but hard puzzle.

I would ask guard A "if I asked the other guard about which side leads to heaven, what would he answer?"

Send me to purgatory, I have unfinished business

this is one of those things i thought would come up way more often than it actually does in life, up there with quicksand and the bermuda triangle