Not by hitting someone. A couple of years ago, was returning from a trip to Sacramento on the Coast Starlight. When we arrived in LA, I exited and hopped on the waiting Surfliner on the next track. After a couple of minutes I see LAPD arriving on a cart and jumping onto the Starlight consist (the car was in front of the one I had just exited). A few minutes after that, a couple of paramedics come running with a stretcher and their gear. About 15 minutes later, they all exit with a huge male strapped on the stretcher, giving him chest compressions.