When I get off the bike and start looking for a cache, I often lay the bike down. That's because on many surfaces, using the kick stand leads to the bike falling over, which can cause damage, especially to the gps holder.
Sometimes, a car will come alongside, and ask if I'm OK. This is because my bike looks as if I've had an accident, and I'm standing around looking rather random, because I don't really want a car driver to see me looking for a cache.
I perceive this as part of the innate goodness of people. They really are concerned that I've come off the bike and might be injured. I get this from both men and women, old and young.
So I say to them something like "Thanks for asking, I'm fine, I'm just haveing a short rest" and they go on their way.