This article is from the Anime FAQ, by Steve Pearl with numerous contributions by others.
The character Bean Bandit in the OAV "Riding Bean" seems almost superhuman. He seems to withstand bullets, car impacts, etc. How can he do this?
1) Bean is supposed to be a mix of all the best races of the world. So he's supposed to be genetically perfect perhaps...or superior.
2) He wears a Titanium mesh jacket lined with Kevlar. 10-20 times stronger than Kevlar alone. Thus the bullets could not hurt him. You'll note he was holding up the collar flap against his cheek to protect his head. His gloves and headband are made of the same material.
3) As one poster said Bean is Sonoda's equivalent of every Tough Guy(tm) that Hollywood has ever created. Everyone from Sam Spade to the Eastwood's Mysterious Stranger (High Plains Drifter, et al) to John McClane of Die Hard. They perform deeds beyond the abilities of normal men. Bean is a modern-day pulp hero, sort of a Doc Savage for the 1990s. He's not superhuman, he's not a Buma and he's not normal. He's a Tough Guy (tm)!
4) The one TRUE source, Kenichi Sonoda, was asked "WHAT _IS_ BEAN?" and he answered: "Bean's one well built brother."