I remember this same joke (exercise/exorcise) from Mad Magazine’s satire of The Exorcist, published in 1973.

Would be funnier if they looked pissed instead of shiny

Oh I heard this before in a song.

"But it’s time to exorcise these demons These motherfuckers are doing jumping jacks now"

• Not Afraid by Eminem

When the cleric is chaotic evil.