Newton had a cat. He was so particular about his experiments that he cut a hole in the door for the cat to pass through. But when the cat had kittens, he cut smaller holes for the kittens beside the big hole for the cat. It was a rather funny display of his logical yet somewhat odd way of thinking.
A funny incident was when Newton was presenting his work to a group of scholars. He was so excited and talking so fast that he accidentally tripped over his own robes. Instead of being embarrassed, he just continued his speech as if nothing had happened, making the whole situation quite comical.
There's a story that Newton was once trying to solve a complex math problem. He became so frustrated that he threw his chalk at the blackboard. But instead of hitting the blackboard, it bounced back and hit him on the nose. He then laughed at his own clumsiness and went back to his problem - solving with renewed vigor.