Watching the Pike's Peak vid...Martin memorizing the 167 turns during his prep. This is just one of many reasons** why I couldn't do that- I'd be lucky to remember 10 or 15. Prefer an occasional 1/4 mile run- no turns at all, unless I hit the guardrail.
**Another reason- lack of cajones, or lack of a Death Wish. Which one that is would be a philosophical discussion, for another thread.