Neither Christopher Fisher nor most of his crew of trauma surgeons were planning on working on the night of October 1, 2017, the night that Stephen Paddock opened fire on a Route 91 music festival on the Strip, raining hundreds of rounds onto the crowds from his 32^nd floor hotel room and ultimately killing 59 people and wounding over 500.

Around 10 p.m., he got a text from the hospital, saying that there may have been a mass casualty.

He says, “About 90% of the time, the mass casualty warnings end up being kind of nothing, minor injuries, so I didn’t think too much of it, but I just got my scrubs back on and I started hearing my trauma pager go off with the first two gunshot wounds and after that I got in my car and headed back.”