User blog comment:KingDedede8888/Top 5: Most painful Death Battle Deaths!/@comment-12846745-20150926024255/@comment-26114005-20150926025435

With Batman and Mario i can agree, but Cap, Goku, and Knuckles didn't feel anything...

Having his neck snapped instantly killed Cap.

Without your brain, you won't feel anything, and by that i mean, ANYTHING. It could have been painful for Goku if it wasn't for that. The body might have reacted to it with pain, but Goku didn't exactly feel it... Gah, it's hard to explain.

Knuckles's crushing was so quick he was probably gone before the body could react and send the feeling of pain to his brain.