as far as i know i came up with this
The PCs come to a hallway, about 15ft wide and 100ft long. On the right side of the hall there are 10 doors, evenly spaced apart. The area in front of each door to accross the hall is rigged with pressure sensitive floor panels, if over 50lbs is applied to the area in front of a door or the door is opened, a log will be launched through the door and crush anyone directly in front of the door. The logs are launched with great speed and force and about the size of telephone poles, saves and such are at the DMs discretion.