First time I did a gravity bong (5 litres mind you) was with Skunk - I hadn't smoked it before, just crappy soapbar.

It took just over 1 minute for me to be throwing up down a four floor flight of stairs over a bunch of students on their way up.

Then I belched out a bit cloud of smoke as I tried to say sorry.

I was known as the Mighty Whitey for that one for a while.