Even if your heels fit perfectly, if you try running in them, they're probably going to slip off. Now that's with regular heels, so imagine that with slippery glass heels.
The correct answer is Teiresias. He is the character form the play Antigone by Sophocles where his presence is in the climax. It is when Creon finally relents and agrees to do the right thing - bury Polynices and pardon Antigone.
1) reflector boards
2) 8mm
3) option 3.