There's also some detection problems on level15b "Storm". If you can get into the keep and land a hit on the LOTL a voiceover will start which instructs the LOTL to go and kill you. The moment the voiceover finishes you are detected.

Would there be any interest in a 100% specials category? I appreciate the leaderboards are fairly thin at the moment anyway, but I'd quite like to build some resources for locating all of the level specials and then attempt some speed runs with the specials.