A woman in Atlanta, Georgia, went off on R&B singer, Usher, for parking in a handicap spot, when he has no disability. Being a singer that believes the rules and laws of society do not apply to him, Usher and his great sense of entitlement, felt he had the right to deprive the disabled of a national courtesy, enacted for health reasons.
Those spots aren't for decoration or to be politically correct. When you have a physical disability, particularly regarding the legs, walking certain distances through a big parking lot or having to park elsewhere, then walk even further to enter an establishment, often means paying for it shortly after, with terrible pain that can last for days and leave you feeling wiped out and fatigued just as long.
The lady had every right to be upset, but it was not a good idea grabbing Usher by the collar, as it violated his personal space and some men will react violently (see: Chris Brown). Usher knew the mobile phone video would end up on YouTube so he restrained himself.