This is irresistible. You are guaranteed to cheer at the end or your money back. (Works just as well without sound.)
Once I spent an hour trying to reunite a pigeon with its two babies. The baby birds had flown into the laundromat and were afraid to leave. I tried everything I could think of, over and over, and finally succeeded. Everyone in the laundromat cheered.
Thanks to Impudent Strumpet and Antonia Z.