Here's an explanation of the title (found in the video's description on Vimeo):

"Water fountains are colloquially referred to as bubblers in Australia, hence bubbling is the art form of pissing in ones mouth or facial region. The first bubbler I ever witnessed was performed by Middy Crossing aka The Bubbler. I saw this man perform the epic manoeuvre in the most extreme conditions in many different states of consciousness, even defying sub zero temperatures to bathe his face in his own urine. Since that day the bubbler has spread in plague like proportions worldwide."

"Nothing wrong with that" - Thomas Fuchs

Callum Paul footage is always a treat.