On a bike?
Sure ... why not? I encountered one driving a snow plow. The road had not been plowed and my car got stuck going up a hill. A blizzard was raging with snow falling at 3"/hr. My daughter was missing (wearing nothing more than a pair of jeans and a sweatshirt). In my state of sheer panic, I took a chance with the car. It could not make it up the hill. In white out conditions, I resorted to prayer. There was total silence - there were no vehicles on the road. Suddenly, a pair of lights appeared at the top of the hill and proceeded down, clearing a path in the opposite lane, before disappearing silently into the dark night. I was able to maneuver the car onto the path (facing any oncoming vehicles of which there were none). Once up the hill, everyone I met was on foot - no cars, no trucks, no vans, no SUVs, no buses - nada. It took a while but I was eventually able to turn the car around and navigate back down the road. Only one side of the road had been plowed (the plow did not turn around and clear the opposite side). Ten minutes later, my daughter appeared in the 'mist' of falling snow. There was and still is NO doubt that an angel cleared that path. None!