John Stinton, to give him his full name, taught my class in the final year of junior school. Highlights of his teaching included an impromptu sex education lesson, which included various far-fetched (and pretty inaccurate) descriptions of puberty and sex acts. He used to frequently 'forget' to fasten his trousers.
My friends and I sneaked a look into his rucksack one lunchtime and found the bottle of 'Lucozade' from which he constantly sipped. Smelt kinda like vodka...
I used to amuse myself by never looking at him directly when he spoke to me, but instead focusing on a spot to the left and behind his head. Watching the poor drunk try to work out what was going on was quite funny really.
I helped get the shit suspended, and he had to go into rehab. Came out, took up drugs, went back to teaching at the same school.