The Apostle Paul had this problem. Young dude name Eutychus fell asleep. He was sitting in the window when he dozed off, fell out the window, and broke his neck. The kid died. Paul raised him from the dead and then made him sit back in the window and preached until the sun rose.
This preacher may do the same thing as Paul and raise the sleeping man from the dead.
But he would only do it in order to condemn the man to hell.