Thanks, hhnngg1.

The wobblers are unlikely to ride rollers (or even to have heard of them). I'm pretty confident that anyone who owns (or considers owning) rollers is a "cyclist" (as opposed to "a person who rides a bike").


Your suggestion about the "looking back" drill seems very sound to me. I'll admit, I've never tried that. I will try tonight, and I suspect it will go very poorly for me.