CAT has some really nice safety materials free for the asking or as it goes on the internet, free for the taking. The one this illustration comes from nicely covers the general hazards of operating just about any kind of forklift.
It includes Safety Information for Operators, a sample Pre-operation checklist, and Information for Employers which applies specifically to OSHA regulations, but certainly addresses best practices concerning task training on MSHA sites with such equipment.
Download the PDF, print it out, and use it for a toolbox talk for operators or anyone who works were forklifts are used.
To supplement it you may want to use the fatalgram and investigation for a Coal fatality that involved such a piece of equipment. It happened on the surface of an underground mine, but the hazards apply to just about any mining or construction site.
Click here for: CAT Forklift Trifold (pdf)