You Can't Change The Past

In the inmate-owned prison one day, a prisoner wanted to go back in time to change the past and save the people throughout time from dying. The prisoner asked one of the inmates "Do you have a time machine? I want to go back in time, change the past, and save the people throughout time from death." But the inmate shook his head and said "Nope! Sorry! We don't have a time machine. We can't go back in time! You can't change the past. The past already happened. Time travel is impossible! There's no such thing as time travel! Not yet!" The prisoner gasped in shock. The inmate then took out his machete and cut off the prisoner's butt. The inmate then took the butt and put it on the barbecue grill for the other inmates to eat. The prisoner lost too much blood and died.