Cat Tales

"Tell me if this is normal:

"My sister has two cats, Emmy and Arnie. My sister put a cat-flap in the back door so that she didn't have to keep letting them out. Emmy, the normal one, nudged the flap and went out. Arnie watched this, and worked out the trick. He headbutted the flap repeatedly, until it was swinging well. He then dived through the gap while the flap was at the highest point.

"He's the only cat I know that tries to ambush rooms. He's not normal."