How had the giant dog learned gr....wait what? Thor noticed the person attached to the giant dog at, oh, just about the same moment as the person noticed HIM and, pointy things were being pushed toward Jane and he was speeding down the aisle too, careful not to yell or anything that would seriously disturb the horses, but a HUGE smile lighting up his face as he ran forward and then...
Tackling was one way to describe it, glomping might have been another. Either way, he was suddenly clinging to Loki and couldn't think of anything to say at all.