Options/Gimmicks with two DMs

[Gahaith]

Hey all, I am in the planning stages of a new campaign, and I will be co-DMing the game with a friend of mine. We were thinking of gimmicks and options we could use to take advantage of this. For example, we could split the party in combat, or during role play for short periods of time and each DM one group. Does anyone have any other interesting ideas?

[Eslin]

Announce you're running with one DM, have the other turn up as a player and together enact an elaborate plot in which he betrays the party.