Unwrap a straw and blow the paper through the straw towards where the vendors are.
Put a stuffed animal that has LED eyes in the pulpit of my church during prayer nights (when the church has the lights off) and light the animal at the moment where the minister is approaching the altar.
Call preachers out on their faulty based arguments.
Totally screw with a preacher’s point during service.
Do silent improv comedy in front of a security camera.
Throw spit balls at a security camera?
Text the most spiritually inclined church members a series of inappropriate emojis.