Paco going nuts!!- first time on grass while on stall rest

PLEASE READ BEFORE COMMENTING!!! American Justice-standardbred gelding great ground manners but when he sees grass he goes crazy becuase he wants to be turned out really bad because of an injury and was on long term stall rest...this was the first time i thought i could take him out for grass and he lost his mind...Other than the injury he was 100% heallthy. He was not scared he was overly exited!! After this day he was let out on a lunge everyday i could and i do have more videos of that. The horse healed from injury raced a few more times and then was retired to be a riding horse...i also have videos of. I do not own this horse anymore either. This horse even acted like this if he had been in the stall from bad weather...on the way too his paddock it was like a reply of this...JUST THE WAY HE IS! :)