Old man driving extremely erratically. Slammed on breaks and came to full stop on one lane road, got out of his car and proceeded to yell at me and try to open my car door. Could not escape him as it was only one lane and his car was blocking mine. Was one of the scariest experiences of my life. He is a terrible driver and a terrible person who threatens others with no provocation. Be wary of him and avoid at all costs.