It's just water!

What is it about water and this dog?

Situation #1:  It is a nice sunny day, the garage door opens and Riggs goes walking outside onto the driveway.

Situation #2:  It rained earlier today and everything is still wet, the garage door opens and Riggs goes to the edge of the garage and then stops.  Dada then needs to drag Riggs outside onto the wet driveway.

Situation #3:  It was a nice sunny day and overnight the sprinklers ran or dew formed on the grass, the garage door opens and Riggs goes walking outside onto the driveway but as soon as we get to the grass he stops in his tracks and has to be dragged onto the grass.