Here's a shot that usually put people on the floor or facing a bucket pretty fast. Most of the people I've served this to have been either stupid teenagers that thought they could drink, or full out boozers such as mich. If you really want to put someone over the top, try this shot... Here goes.
Triple Sec or Cointreau.
In a coffee mug (or something that resembles it, like a teacup, or one of those gay little tea or milk pots) pour 1.5 centiliters of each ingredient. Place the mug in
a microwave oven for about 15 seconds (just so the liquid is hot- not boiling, unless you hate the fucker your serving). Once out of the microwave, pour the nectar into a shot glass. Now since a normal shot glass is around 3.8 centiliters (although bars say it's 4 centiliter shots, they're actually cheating you out of .2cl of booze- an outright scandal), you'll have about half a shot too much left in the mug once you've filled the shot glass. Pour the rest of the liquid around the shot, or make a small line with it on the bar leading up to the glass. Give the sorry bastard a straw, and light the bit you poured on the bar around the shotglass. This shit will ignite like Napalm, so be careful. The bit on the bar should lead up the shot glass and light that as well. Once lit, tell the bastard to shoot it through the straw. Tada! you have a Cucaracha.
Note: if the poor individual drinking has had a few before the cucaracha, have a bucket handy.. trust me.
"The hard part about being a bartender is figuring out who is drunk and who is just stupid."
- Richard Braunstein