It's level 3, and if I remember correctly I never saw any boots on level 2. So I either needed to take a risk (which worked out at the time) or lose some health. Actually, I think a better example of how totally screwed you can get would be a game of AoB I once played where I was knocked down to 30% health, had maybe two medpacks, and found myself staring at a large pool of lava on the second level. But technically that's a different subject. This is about teleporters, which according to the 9.8.7 version information should have been fixed not to spawn in corridors: "[fix] -- teleports will no longer block passages".