Fun at Walgreens. Of Course, When is Walgreen's NOT Fun?

In the checkout line at Walgreens:

NAK: You know what would be fun? Taking this [pointing at Ex-lax, a stool softener] and this [pointing at Fibercon, a stool hardner] at the same time and see which one wins.
Me: You should totally do that. With photographic documentation. It could be a photo finish!
NAK: We should make Ex-lax/Fibercon cookies for the next food day and watch the hilarity ensue.
Me: Or not ensue, depending on which one wins.
NAK: Department outing to the bathroom! It'd be a team-building exercise!
Me: They keep saying they want us to get to know each other better. What could be more personal than a poop-off?