Pat originally drew the "Bokkus" character on the backside of a drum head while recording the Blue Album at Electric Lady Studios, where it hung on the studio wall as decoration. Later, when he decided to use the head, he traced Bokkus onto the outside of the head, only to discover that the hole cut to accommodate microphones is right where Bokkus' pipe was, so the pipe is squashed below the hole. This led to people thinking Bokkus is blowing a big bubble out of his pipe.
After some touring the head was cut out and saved by Karl Koch. He then used the original head to trace a copy on paper which was used to recreate several new Bokkus heads for use on the Memories Tour.