I wouldn't worry about it. If he goes to another area it won't be because of this one non-threatening contact, and I'd say there is a good chance he will be around in 2 weeks if someone else/something else doesn't booger him up.
On the farm where we hunt we often bump into birds on the roads either in trucks or on tractors, doesn't bother them. My advice in general is to not stop if you do make contact with a bird, just keep on moving SLOWLY past them and they don't get too worked up.