Always glad to help out and serve as a warning, I mean example, to others. That's my story and I'm sticking to it!
I should have kept my feet out until I was sure the bike was accelerating. Lesson learned for the next time I went around the block and tried again. Too bad easy drops like that aren't the only kind of get offs.
Since the canister is on the outside of my vest, I'm not worried about it causing any damage to my ribs.
I'm surprised there isn't a place that refills the canisters. Reduce isn't practical in this case, but ideally reuse and recycle should be.