Then there's the Holy Fire, with the bonfire outside the church on Holy Saturday. The passing motorists probably think we're burning heretics.
............................

Ny father-in-law was telling me how one time when he was a boy, back in the 1920s, he and his brother, who were altar servers were messing around with the thurible in the sacristy, while the priest was absent, swinging it round to get the charcoal good and hot, and the chain came undone, scattering charcoal all over the plade. So they cleared it up as best they could, and did an emergency mending job with a bootlace before the priest returned.

Unfortunately while the priest was censing the altar, the bootlace burnt through, sending red hot embers and incense all over the place... The church didn't actually go up in smoke, but Father Theophilus was not too pleased.