The actual move of Hot Potato is as followed. You & 3 buddies start playing Halo Reach. Technically it's 3 including yourself but a good rotation with 4 + is always a thriller. 3 of you & 1 unfortunate soul on a team is the actual plan. Once the game starts, turn towards the middle of your team & say "Hot Potato" with your headset on & throw grenades on the ground & everyone dies with the game saying "betrayal, betrayal". All 3 of you do this while the 4th innocent victim is confused. Everyone starts up in the same spot again, thus Hot Potato continues. After 2 or 3 times the 4th guy starts to pick up on it & by that time the game has sent him a message giving the choice to boot you. Most of the time boots are around the 2nd & 3rd time. In some cases the 4th player will try to kill you while cursing over the microphone in an unhealthy rage. Point out too him it's only a game & his mother would enjoy your Hot Potato if she answers your booty call. This will cause him to make threats but it's better for him to say he is going to beat your ass over Xbox Live than for him to beat the shit out of his girlfriend.
If by an act of God 1 of you & the 4th player survives the event then a hail mary grenade pass to the 4th player is a follow up. This combination, Hot Potato Halo Mary.