Arnold is definitely quite incredible that's for sure. I like that he came up with a lot of his own lines when acting, some of the best one liners he invented himself . They just crack me up !
I like the movie where he kills the passenger next to him on the airplane (it's some evil spy or something), then he puts a blanket on him and leans his head to the side. When the flight attendant comes with food he tells her "dont disturb my friend. He is dead tired!"

He has definitely more then just big 💪muscles, he is really a smart guy for sure