Richard Wiseman is back with another collection of clever tricks and simple science experiments that you can finally use for profitā€”not just entertaining your friends.

We just suggest keeping one last trick up your sleeveā€”namely the hasty retreatā€”since some of the solutions to these bets could very well upset the person you've targeted, particularly when it means they're losing their hard-earned money. But in the meantime, have fun watching them pull their hair out while they try to float a paperclip in a glass of water. [YouTube]