I've occasionally dug deep enough into exercise-inducded hypoglycemia to have very, very mild hallucinations, but mostly it just forces you off the bike; if you

I've occasionally dug deep enough into exercise-inducded hypoglycemia to have very, very mild hallucinations, but mostly it just forces you off the bike; if you could go on exercising at that point, you'd be at risk of doing neurological damage, like someone injecting an OD of insulin. I'm familiar with Robic from other articles, and it seems pretty clear that his craziness is sleep-deprivation induced. He wins those multi-day "ultra" events more by sleeping much less than by going faster.