Sound
For some reason, you are standing on the sun. It's obviously very hot, but the thing you notice most is the sound of you burning up.
Imagine a super loud sizzling sound, drowning everything else out. It's ridiculously loud, and hurts your ears more than the sun's heat hurts your skin.
おん
おと, ね
None
This sound isn't just loud, it's familiar. Finally you place it: onions (おん)!
Your burning body sounds just like sizzling, crispy onions being fried in a pan. Listen close. It's exactly the same! You can almost smell onions too!