If you can't answer, don't post another question. Defeats the purpose of the format. If people need to do some research to get the answer, so be it.
But the answers to your questions:
1. In the Adventure of Lomax Lemming, at a checkpoint.
2. mine if there's enough terrain, then build so they don't go too far. If you only need to turn one Lemming, some versions let you build on a piece of metal terrain about two blocks, mine, then he'll turn.
Again, my question:
When you bash a bridge in Lemmings, you either get a shorter bridge or a hole through the middle.
However, on the NES the mechanics for the basher are different. What percentage of the bridge is left over when you bash it?
I'll make it multichoice, although there are enough YouTube videos so as to satisfy, and the ROM is on the Lemmings Archive.
A) - 25% - The basher takes out the majority
B) - 50% - The basher takes out half
C) - 100% - The basher destroys the whole bridge