Father's response to uncle climbing tree

It's been quite a while since I saw this movie, so my memory may be a little vague, but as I recall, when the family goes on the picnic and the crazy uncle climbs a tree and refuses to come down, the frustrated father, his brother, takes off his hat, throws it on the ground, jumps up and down on the hat, while hollering "I'm a horse's a$$! A horse's a$$ !"

Am I correct? That scene has stayed with me because, at least as I recall it, it portrays one of the classic comedy images that we've all seen at least once somewhere: a man jumping up and down on his hat in outrage. It's almost an archetypal image in some ways.



And when he crossed the bridge, the phantoms came to meet him