1. Fill a shot glass about 3/4 full with amaretto and top it off with enough 151 proof rum to be able to burn.
2. Place the shot glass in another glass and fill the outer glass with beer (right up to the level of the shot glass).
3. Ignite the amaretto/151 and let it burn for a while. Blow it out (or leave it burning if you're brave - not recommended) and slam it. Tastes just like Dr. Pepper.