Carpenter Jason Wolfe posted this prank he pulled off in his workshop, which also doubles as a tutorial on proper workplace gag techniques. When pranking co-workers into thinking you've had an accident, it's important to take steps to be safe, and also to not be a jerk. That way, everyone can look back on your practical joke without needing quotation marks around the word "prank." In this properly executed gag, the duped coworker merely looks like someone earnestly trying to help before slowly realizing he's been goofed.