Chronos: "By the way, liquid gasoline will also extinguish matches, if you immerse the match quickly enough that it doesn’t boil off fumes (just like with alcohol)."
I sort of witnessed a demonstration of this, when a biker offered to prove it to me by dropping a lit match into the gas tank of his trike. I say “sort of” because at the point when he had the cap off his tank and was striking a match, I was running the other way! No explosions or big fireballs followed me though.
As for burning beverages, I can reliably report that drambuie, 40%, will burn nicely at body temperature. I have held burning drambuie in my open mouth with my head tipped back and nice blue flames coming out. I got away with this unharmed but I won’t be doing it again (probably - I get kind of stupid when I’m trying to impress girls! I’m even more stupid when the girl does it first and then challenges me to have a go.)
A word of caution regarding the flaming-drink-through-the-straw trick: you gotta be quick, or the straw will melt. The idea of molten plastic coming up with the liquid in the straw doesn’t sound too good to me (although, in all likelihood, by the time it reaches your mouth, it will have been cooled by the liquid, which was drawn from the bottom of the glass).
(then again, when the straw melts, it develops a hole where it passes through the fire, so you might be sucking up hotter liquid than you expected)
I noticed this when trying out the Flaming Blue Fuck, the principal ingredients of which are Sambuca (or Sambuka) and Blue Curacao. When I saw the straw melt, I quit drinking and blew the flame out real quick.
Oh, and regarding Everclear, it’s not available in California, but it is in Oregon. When I was in school (in CA), it was common for people to ask friends going on trips to Oregon to pick them up a bottle of this coveted uber-alcohol.