Happens all the time. If I am in a position to help, I definitely do so. In 2012 I and Opendro witnessed a major accident and stayed around till ambulance came enroute to Nandi. Open even went with the police to help identify the vehicle from the CCTV at the toll plaza.
Few days back a girl in front of me skidded badly hit an auto and fell, thankfully minor scratches. No help was needed this time. The auto guy defended himself, the girl was shaken. The culprit was a sand bank which the girl didn't /couldn't see since she was tailing too close.
2 years back enroute to start of the 600 in June, I witnessed a bad accident, somebody had got hold of a jeep , I went to the hospital. Again no help was needed from me, but I was around just in case. Went with the group that was helping this guy. Again he was drunk and just trying some stunts. He was in bad shape though.
I think if we are in a position to help, we should, regardless of if we are in a car or a bike. If its a minor accident and two guys are fighting it out, I don't bother but if somebody is hurt and I am in a position to help, I try to.
Regards
Chiddu