Discovered by: Jonathan "Hunter" Hoof
Demo: d1l-jrh.zip (04/05/1996)
Skills needed: tapping your use button till you find the switch

Difficulty: easiest
Description:
This switch trick is so old, that nowadays there are people who know it when they're born

It's really really lame that id spoiled that cool rocket jump into the secret exit by allowing this trick to be done... no skill required whatsoever. OK, maybe if your time is important...