Requirements: Regular mode (not Hardcore) A cooperative squad of 2-4 players (including yourself) At least one player with C4, preferably two-three. A map that has access to a UAV.
In order for this to work, one player must control the UAV, land it next to their squad members, and have them place all of their C4 on the UAV. Then, the UAV operator flies to the M-COM station, gets near the bomb site, and tells his squad member(s) to detonate their C4. This can be done multiple times, and will eventually destroy the M-COM station. This makes winning much easier, although it is sometimes looked down upon.
When you are driving a vehicle in multiplayer, preferably a light vehicle such as the Cav, you can put C-4 on the car and still drive it. Drive the car directly into enemy territory, towards a large populated area. Be driving at full speed, then exit the vehicle. immediately detonate the C-4, killing all the enemies with the explosion of a C-4 (larger than 40mm grenades and hand grenades), at the speed of a fast car. plus it is really funny