- [Man] Liquid Ass is a stinky liquid

that smells like butt crack with hints of dead animal.

- [Narrator] So, there are these guys.

- Andrew Masters, I make Liquid Ass.

- Allen Wittman, Liquid Ass creator and head janitor.

- We make the world's best stink product.

- [Narrator] And they work here.

- [Allen] This is what we call the Ass Factory.

- [Narrator] They hated their jobs,

so they followed their dreams and started

a successful prank product company,

specializing in a really rancid fart spray.

But they needed a name.

- I said, "So, what we gonna name it?"

And he's getting ready to sit down and he goes,

"I don't know, Liquid Ass?"

And I'm like, "That's it."

(funny music)

- [Narrator] Then something curious happens.

- [Allen] We're making a product specifically

for pranks at first, but then we start getting calls

from military people.

- [Narrator] Enter Stu Segall, this guy.

- Stu ordered from us, and I'd never met Stu.

It sounds like he's got a,

you know, a pretty neat business.

- [Narrator] He really does.

- And he'd come up with the idea to use it for a triage,

but the fact is that it goes from prank product

to medical field is sort of a,

sort of a jump.

- [Narrator] Turns out there's a secondary market

for this stuff, training some of the most elite

armed forces to do their jobs.

- We are a company that replicates the environment

of combat and right now we are in a set

that we built for medical training.

- Woah.

- Oof.

- Woah!

- [Narrator] Basically, before this prank fart spray,

some of our best troops and emergency medics

were going into the field completely unfamiliar

with the overwhelmingly horrid smells of death

and disembowelment that they would probably encounter

as part of their jobs.

- It's a very awful smell.

It's something that could actually gag a maggot

as far as I'm concerned.

It just smells like Liquid Ass.

- [Narrator] Back to these two jokers.

- [Allen] Now we have a product out there

that's helping military training, which is great.

- [Narrator] You know, not all heroes wear capes.