Take 2 x SHOT GLASS, in one pour 1/4 VODKA and 1/4 BLACK SAMBUCA.

Light the alcohol with a match.

Place the other SHOT GLASS over the first as to construct a "Chamber" like so:
_
/ \
\_/

Be careful not to extuinguish the flame.
Once some alcohol has burnt off (about 30 sec to 1 min) place a straw in the gap between the glasses and drink.

Once the alcohol has been drunk, continue to suck the "Gas" out of the "Chamber".

Recommendation: DO NOT DRINK MORE THAN 2. It's powerful stuff, you'll have the worst night ever. (unless hugging a toilet is you're kind of fun.)