Pour a glass of some highly-carbonated lager (not too hoppy). You can use cheap beer, it's ok.

Get a shot glass out, and fill it halfway with amaretto. Then, float the 151 proof rum on top. Once you have everyone gathered around ready to go with their own setups, ignite the rum, so that you have a bunch of flaming shot glasses.

Now, drop the shot glasses into the beer and slam it back! The combination of fire, bubbles, and sweetness should taste exactly like a Dr. Pepper. Crazy!

Don't wait too long with the fire burning on the glass, or it could crack and/or seriously burn your lips (both of these things have happened to...uh...a friend of mine)