Probably not the joke I would have used as a long time store manager myself, but I love the concept nonetheless.
Perhaps a joke where he would find another superhero to delegate the task out to because of how simple it was? Ah yes, thats what I would have done in real life.
The art was a bit simple, but works. I think the pictures would have looked more visually appealing if they were closer together. No white space in between, with a solid and thick line creating separation.