SCV Rush

Eliminate your opponent in less than 2 minutes!
Recommended in games where you have an ally, and on cheap maps with tons of expansions in one base.

-With your first 50 minerals, build an SCV.
-Send your 4 starting SCV to one of your non-Terran enemy's base. As much as I hate to say it, a map hack would help.
-When the SCV you built earlier is done, send it to your ally's base. Also lift-off your command center and land it in an expansion near/on his base.
-Attack all the workers with your 4 SCVs, and you should win. Repair when neccesary.
Note: This will NOT work against comps.
-That opponent will probably leave the game :) . If he doesn't, just kill him with your SCVs.