These images are part of a collection of work vehicles. This file includes line art of a "bucket" truck and a truck with a crane. These are done in a style of a collection of other vehicles available here.
This excellent cartoon was synthesized from a public domain safety poster showcased by the NARA. The original poster had this man wearing a conical hat that said "dunce" or something, but I thought it would be more universally usable to just remove the hat and have his actions speak for themselves. Enjoy!