I had the air thing once.... Quite amusing.
The double breast suited and half moon spec wearing professor disappeared beneath the horizon of my hip and I could no longer see him. And then the air went up.
Very shortly afterwards, the air came back out.
The professor emerged looking like Stirling Moss after the Mille Miglia.
Damn you Neil.......I've just spilt my coffee bursting out laughing at that!
... 
