So, I was outside with my cat (he was on his and my other cat's harness) and he was acting normal then he went berserk. He started running SO fast he was on his hind legs at one point bc i was slightly pulling on the leash and he ran into and out of a bush of poppys in my front yard's flower bed. Then he ran up to my front door and attempted to open it. He's better now, I think heh... Anyways, we have no clue what spooked him maybe he stepped on a thistle or there was a high pitched noise? (cont