Kid was born with defective legs/spine and his folks got told that he wouldn't walk.
Pops owned a night club and would take him and apparently homey would just dance in the chair and stayed upbeat.
Docs were wrong, he got better, started to walk and then started to dance. All the time.
Dude would just hear music next door and bop his ass in with his mechanical walk and start dancing to the point he got the nick name (Uninvited) or some shyt in Spanish, 'cause he'd just show up and cut loose.
Salute to brehitto for never giving up on himself, man.