you learn randomly: Duck brand duct tape is, in fact, not used for air
ducts, but rather a very competitive sport in the Netherlands wherein
the goal is to capture and subdue, with the tape, a wild duck. This is
accomplished by running with tape and a long pole towards a duck. When
the duck starts to fly, one simply pole-vaults into the air and must
capture and tape the duck's legs and beak before landing.