I've had 2 particularly memorable highs, both involving work.

1: Smoked loads of weeds and ate far too many resin cookies and brownies one day. I was eventually so stoned that I felt like I was tripping. My pupils basically filled my iris, and it was the weirdest/best feeling ever. Got up the next morning for work, and I still felt the same. Pretty much floated around all day at work and everyone thought I'd gone mental. Finally came down the next day.

2: The first time I'd ever smoked before work, I went in, and felt really paranoid. I worked in a fast food restaurant, and they put me on the order taker window for drive thru. Was stood there inbetween customers, looking at something on the floor, then looked up and Bob Mortimer (from Vic and Bob fame. Maybe only people in the UK will have heard of them) was sat in his car, patiently waiting for me to take his order. So fucking weird...