Lately he's been showing off.
He jumps from the floor to the top of the refrigerator ( 5' 6" ) like jumping onto the curb.
He also has been jumping from a kitchen chair that's 4 feet away to the top of the fridge.
All four feet on top easily with room to spare.. No pullups or anything.
I'm not sure what started it.
I walked in the kitchen one day and he just took off....