When someone comes up from behind you and puts their arms around you as to hug you and then adds a pelvic thrust into your lower region.
We were in the garage and thought nobody was looking so I surprisedmy wife with a humphug...unfortunately our son caught us and asked what we were doing.
When you travel and get constipated, you might suffer from jetlog. Try as you might those logs won't leave you. Tends to occur simultaneously with jetlag.
Usually I am so regular you can set my bodily movements to a clock, but after traveling all day I have jetlog.