Ooooooh… I had never considered that one might be able to pedal that fast… 
So it made me curious as to how fast people can pedal. Just found a video of someone on rollers doing apparently 250rmp. Uuuuhhhhhhh, ok. 
Don’t worry, I won’t be trying that any time soon.
Thanks also for your ideas about my cleats. I will need to work on that. And I think we are going to try riding outside next weekend. Terrifying. But if I want to try to ride in the Hotter than Hell thing in the summer, I guess I will have to learn to uncleat and ride outside at some point before that.