Time to put the hive mind to work.
I watched when I was young a movie about a guy who wakes up to discover that everyone disappeared. After a while and finding 1 or 2 other people he discovered that the only ones who stayed are the ones who died exactly at the time of the “event”. Probably some serie B movie but I want to watch it again.
Not sure if its that one when the guy enters a in a church with a shot gun and a dress and shots things, or I confuse this part with another movie.