Great idea, hanging that duct tape! On his 50th birthday my best friend wrapped up a case of duct tape for him as his gift! He ran out in about 2 yrs.
Just one example of how he's used it in the past (the man has no pride):
He ducted my bumper on my mini van when it was falling off and said "Honey there's a roll under the driver's seat if it falls off!" OMG!!!!! - but it worked! (Till I finally got fed up and cut it off and THREW it out in the yard and insisted on a new bumper! (Those plastic ones are junk!)