Smash Wall (trap idea)
Here's one for you Dm's that want an entire wall to be a trap. The players are entering a room, when one of them presses something that was on the wall. It goes into the wall & falls on the other side, making a *thunk* then a click noise. After that, the wall will slowly start to lean forward in the next 14 second & then it will slam against the ground. It will rise up & return back to it's natural place after 7 seconds or so. If a person get's caught in the room when this happens, they will take 3d10 damage. (To not get hit by it, leave the room)