Why not use the time doing pull-ups while waiting for a train to pass? This fellow has the right idea.
Info From Licensor: "I was on my way to work and was waiting in traffic for a train to pass. The driver of the truck in front of me got out of his truck and began to do pull-ups using a bar on the back of his truck. He then finished after about 12 pull-ups and returned to his seat. Apparently he read a book written by a man in prison on how to keep fit without the use of gym equipment, instead, using every day items to work out."
Occurrence Date: November 16, 2015