Had a similar experience on our way back from Vegas last year. Random kids on I-15 in Utah hanging out the side of the car with a camera taking pictures. I think nothing of it, give them a wave, this sort of thing happens quite a bit for some reason. Anyway, we stop for gas a bit later, and these kids are at that gas station too. We get to chatting a bit, and they ask if they can take some more shots. We of course encourage it, and he shows me a few of the rolling shots... wish I'd have given him my email and asked him to send them to me, they were good shots!