Many businesses are started when someone sees a problem that needs to be solved that nobody else has solved yet. In some cases, what one person sees as a "problem" worthy of buying a product to fix, others see as a complete joke. That's what happened when Dr. Floyd Seskin — yes, an actual doctor — came into the tank and presented a solution to what he saw as an issue that needed solving and was met with laughter from the sharks.

Seskin was trying to secure a deal for a product called the UroClub, which was a portable urinal that golfers take out onto the course with them for when nature calls and the nearest restroom is way back at the clubhouse. Though none of the regular sharks even pretended to take the UroClub seriously as a legitimate business, they were nonetheless amused by the product and by Seskin himself. However, guest shark Kevin Harrington surprised the rest of the panel when he made Seskin an offer, which Seskin wisely accepted. 

That said, as often happens, Harrington and Seskin were ultimately unable to finalize their deal — though the UroClub did okay for itself and went on to be sold through Amazon, Wal-Mart, and other major retailers for a time.