i say it wasn't roadies prick nor mtbikers are angel thingy.
some are good, some are bad.
it this simply human upbringing personality.
back to topic.
i would def.stop and ask if help is needed.
two days ago i helped a lady having problem with her stucked chain.she didn't even ask me,when i saw she have trouble i immediately help her.
but,..one must know how to read situation and condition sign.i know someone in need help and some who don't. just by the look of their gesture and their faces or eyes.
i also..been saved by stranger many times during my rides.
luckily i always encountered trails and roads angel whenever i'm in troubles.
and if nobody come to my rescue i can always look for help.