You are at the top of a hill or otherwise in an area where we are at our lowest speeds (truck stop, on-ramp to a freeway, etc.). Protips: It's illegal for truckers to pick up hitchhikers in the U.S., but we'll sometimes take a chance providing any of the following are true:
I was actually glad to see a hiker just over the hill. There was little chatter on the CB, nor much traffic, to help keep my mind on the road. I was in a pretty pissy mood by the time I reached the top of the hill. I was running slow enough as it was due to the pea-souper, but matters were worsened by being on a 10-percent grade, further forcing me to stay with the lower gears and being unable to take advantage of any breaks in the fog to speed up. Cheesy as it sounds, it really was a dark and VERY foggy night. I was dead-heading a rig on I-10 eastbound in California (just outside Cabazon if you care) towards Palm Springs. I'll have to go back a ways for this one, to the mid-eighties. If you want it so damn bad, spoiler at the end of the post - if you don't read the post first, though, the joke is ruined