You might be able to tell them you were stupidly jumping on your bed, like a child, and fell into the wall.

Depending on what your parents think of you, this may actually work.

This working also depends on whether or not your parents can tell the difference between an ‘exit wound’ and an ‘entry’ wound on wall damage, so maybe doctor the scene a little, or, maybe your parents are morons / know nothing about residential construction.

(Probably hide the dildo).

One thing you could try is to just actually jump on the bed, fall into the existing hole, re-damaging it more in line with, you know, impact damage…

Do that while they’re home, so they hear it, and then just be completely honest and explain your mistake, while also being somewhat injured.