Here's one for you... There is a doctor that keeps his Cirrus at our airport. He has forgot about the tow bar not once, but twice. Both times he did some good damage to the plane. You know the way on military aircraft they have the markings showing how many aircraft they shot down, etc. Well, he has those on the back side window of his Cirrus except his represent how many times he has screwed his own plane up. He thinks there is a joke to be made of it.
This is also the same guy who once owned a light twin. He showed up at the airport one day after being gone for a few weeks and jumped in his plane without doing a preflight. He didn't even check the fuel. Well, if he didn't even bother checking the fuel what's gonna make you think he is going to untie the rear rope. He only untied the ropes under the wings. He jumped in, fired her on up, and tried to taxi out. You should have seen how high he had those engines powered up trying to get the plane rolling out of the parking spot. All he was doing was making the knot tighter and tighter. He finally cut the power and got out. Needless to say he had to cut the rope.