"Say, you're good at murder. Could you - ow - murder this dog for me?"
(in case this comment leaves you confused - it was a reference to a game that fits with this image)
Added thought: The comment is especially fitting, because the command in that game to give you a potato is 'upgrade_potatogun', which matches the title.
(in case this comment leaves you confused - it was a reference to a game that fits with this image)