
Oh I love that, Bradfordlass.
I have a book somewhere, which is full of those kind of bloopers. 
Anyway, I came here for a moan, and moan I shall.
I filled up my vape tank, sat down with a cup of tea, ready to have a lovely vape.
Scratched my head and it felt lovely, so spent a long time massaging my head and running my fingers through my hair (nobody else to do it!)
Swig of tea, inhaled on my vape and got the taste of old socks.. vape tank empty.
Where had the liquid gone?
Well, I hadn't closed the vent when I filled it, and it was in my hand when I first scratched my head.
So I had emptied on my head and massaged it all in.