Make sure the main protest is in a separate part of the city from the parade route.
There are 100% people with a gene that makes them metabolize anesthesia super rapidly, myself included. It's linked to the gene for red hair, but red hair isn't a requirement (I have it and I'm not a redhead, although my mom is).
I've 100% woken up during surgeries I should not have been conscious for, because the anesthesiologist didn't believe me. Those include a pediatric colonoscopy, surgery to set a broken arm, my TEE (I was conscious, but in twilight sleep. Took 3 vials of versed and I still remember it), and my septoplasty.
And it's not just general anesthesia either. It takes a fuck load of local anesthesia for me to feel it. My last filling they had to give me so much it paralyzed half my face for a while. Also, I wish my urologist had believed me when I said I wasn't numb for my vasectomy.
Mine was OkCupid, but I know my results aren't common.