I'm not a pyrotechnician, but i have been drunk a lot in the past. ANd i've seen a lot more impressive flames than that. We used to hold a lighter out and spew Everclear (grain alcohol) out of our mouths. Used to get flames all over too, and it never hurt anything.
One time at a party a guy threw us out of the house when he came in and found the better part of his kitchen "on fire."