["I witnessed a man rob an old woman walking across the street. Boils my friggin' blood!", "Oh my God that's terrible!  So sad.  I'd be mad too.  What did you do?", 'I would have chased that punk down if I was close enough, but I saw it from a distance.', 'Did the police come? I hope she got her stuff back', 'They did, and I explained in as much detail as I could remember what he looked like. Hopefully they catch him.']
No kidding.  I would hate for that to happen to anyone else.
I just witnessed someone steal from an old woman walking across the street. Boils my blood!