Unfortunately, flip-flops don't stay on your feet that well--a problem when you try to run from, say, the police, or you encounter rapidly moving water. On the end-of-summer Instructables rafting trip--How to Raft, noahw?--they made a big fuss about having heeled sports sandals or tennis shoes and not flip flops that would flop off of your feet and float away.
But who wants to go buy or borrow sandals or shoes when you've got flip-flops and duct tape at your disposal?
While some of you may be doubters at this point, I guarantee that this was successful. Find your duct tape and read on!
Step 1: Supplies
*A pair of waterproof flip-flops