My belt failed

That’s correct. I was at a stoplight and had started to pedal. There was certainly something funky going on down there at some point but it’s hard for me to give details since I was so surprised at the moment.

I don’t have a tension meter for the belt. How do you judge the correct amount of tension without one? Is there a rule of thumb for the STRIDA? The belt is much looser now than before the accident. But I had been doing it be feel and noting how much effort it took to push the belt against the crank tube.