Spare Air

Once at DEMA's (Dive Equipment Manufacturer's Assn.) annual trade show there was a long, boring, and tedious seminar on new gear. The speaker asked if there were any suggestions for new gear. I stood up and asked (with a straight face, too) where I could buy a 'Spare Air' that lasted 45 minutes at 90 ft like they have on Baywatch. It took about ten minutes to restore order and I couldn't buy a drink that night.