My students were so loud today, my left ear started making a crackling sound.
My left ear makes a crackling sound when I hear loud noises.
My left ear makes a crackling sound because I think I ruptured my eardrum as a teenager.
I ruptured my eardrum because I thought it would be funny to put a couple of drumsticks in my ear canal and run around.
I fell down the stairs with two drumsticks in my ear canals.
A trickle of blood from your own ear canal is something no person should ever witness.
A couple years ago I told my doctor about the crackling sound in my ear, she said, "Oh, that stinks. I am sorry to hear that." No advice, no further tests.
Moral: Never put drumsticks in your ear canals while running down stairs.