I imagine a fair amount of duct tape has gone into their creation
normal tit tape wouldn't cope
(
Sivvus trolley collision in the fruit aisle led to a jam,
Thu 2 Dec 2010, 0:33,
archived)
Check out the Amazing Bouncing Bagel.
This picture was done the same way.
(
Grampa,
Thu 2 Dec 2010, 1:01,
archived)