You go on to the next group and not even think twice about it,he had the desire to purchase a ticket and go through your attraction and that meens even though you didn't effect him didn't meen he didn't enjoy himself.
Otherwise if Mr No personality didn't think it would be a good time he would have went golfing instead and not spent the money on a ticket to begin with. He just didn't allow himself to enjoy your show, don't sweat it man he's one in 1000's!
Now if 1000's go past you stone faced and only 1 jumps then you might consider taking up golfing!
Who knows maybe he was on lsd or something, don't sweat it really!