I know and am friends with pretty much all the people that chief bud at my workplace but usually won't smoke unless I've got a good 4 or 5 hours before my shift starts. After 4 or 5 hours its impossible to tell that I was high or anything but after about 5 hours I usually don't feel groggy or tired from the weed anymore... and I hate being tired during work. It would be cool to have a job where I could go into work blazed but because I'm a computer technician there would be no way for me to focus enough to actually get work done lol