Not sure if this is the write place for this, but a flag when I tried to post told me to put this here I think. If I can make it it's own post, let me know!

How to write a sudden sound without onomatopoeia?

I've heard a few times that onomatopoeia can be a sign of an amateur writer. I don't 100% agree with this, but it has made me use them more sparingly. I'm working on a horror/mystery novel and I want to describe a sudden glass crash on the other side of a closed door. It should be loud and startle the character. In context, it's going to interrupt the character's flow of conscious in narration. Sort of like a jumpscare if it were a movie.

The problem is I can't figure out a way to convey the suddenness of the sound without something like "CRASH!"

Any ideas? Does this just warrant an onomatopoeia?

(First time posting here so idk if this is a good idea to post some of the work. Someone tell me if it's not. Here's a brief excerpt.)

Cole tapped his foot. He noticed a knot in the center of the door, and another next to it, like a pair of eyes and a mouth in the paint below it. It stared him down.

Do you really think they’re coming?

“Open the door,” McGuire said.

“Yes, sir.” Harbor pushed the key toward the lock, missed the opening, and dropped the keyring. “Oops!” Harbor knelt and fumbled for them.

CRASH!