Properly performed, CPR can triple the chance that someone survives a heart attack, but even the best-trained Good Samaritans can have trouble finding the right rhythm and pace for the chest compressions. Unless, that is, they're disco fans. A 15-doctor study found that teaching CPR to the tune of the Bee Gees' song "Stayin' Alive" (the snappy anthem of the movie Saturday Night Fever) helped students perform the compressions at the proper speed and pace on a test five weeks later. Who said disco was dead?