I stop for bikers.
That’s about it.
In 1973, while riding my Triumph 650, I stopped for Keith (Bandit) Ball and his buddy, flying colors, just a few miles after they’d successfully scared the crap outta me, by passing me on both sides.
(southbound I-5)
They appreciated the help, but told me directly, NEVER STOP for bikers flying colors!
Keith was co-editor for Easyrider mag. at the time.