Check out the man on the cover of QST March 2004 smoking a Morse Code
bong!

The use of breath power to key a rig goes back at least 32 years that I am
aware of. There were patients of mine who used that system to play pinball
machines ...for flipper control. I also recall having a QSO a number of
years ago with a fellow who used a puff keying system. I haven't read the
article yet to see if there was a new "twist"..... also had patients who
used the system for scooter control .... tried it once ...took out some
woodwork and plaster.

God Bless 73s KI3R Tom Popovic Belle Vernon Pa