The first and most known random use for duct tape is making a working boat. the myth busters have done this as shown in my featured image from paper course.

How to build duct tape boat

1) build a frame you can tape around in the shape of a boat

2) buy a lot of duct tape

3) put overlapping strips of duct tape on the inside of the boat

4) repeat step 3 on the out side of the boat

5) enjoy your new water craft