Marvel: Superhuman Flexibility

Kurt Wagner (Nightcrawler)
Nightcrawler's bone structure allows him great flexibility. He can remain in a crouched position for a long time and perform contortionist-type feat swithout causing any damage to his spine.

Mortimer Toynbee (Toad)
Toad's bone structure enables him great flexibility. He can remain in a crouching position for long periods of time and perform contortionist-type feats without causing any damage to his spine.

Other Characters

 * Jessica Drew (Spider-Woman)