Shows how a player might inadvertently get blocked from accessing a pair of rooms, including a Secret one, in Doom/Ultimate Doom level E2M4, Deimos Lab. This can happen by crossing a floor-raising 'tripwire' at the edge of a shallow dropoff, but then retreating from that area instead of stepping down. (Stepping down would allow access to a switch that lowers the floor again.)
0:00 - Start
0:07 - Impact-activated wall
0:10 - Secret area
0:13 - 'Tripwire' raises floor
0:16 - Floor not too high here
0:19 - Floor here is too high
This video is part of the ClassicDOOM 'Doom/UDoom solutions' playlist:
• Doom / Ultimate Doom solutions
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