Done is six days
Bill Murray filmed all his scenes in an amazing six days.
“He got all of that one” is one of the most famous scenes, but so were the ones involving the animatronic gopher. Believe it or not, Ramis wanted to use a live animal but that wasn’t going to work out. So they rigged up the robot groundhog and shot most of those scenes towards the end of production.
And the part where Murray blows up the course with dynamite? They actually brought in tons of dirt and built up a hill on the 18th hole because the golf club didn’t want the actual course getting blown up. The pyrotechnic crews then ended up using too many explosives and totally decimated the makeshift hill. The explosions were so big, in fact, that planes flying by reported it all to the local authorities.