Awesome sauce video is 5 minutes long and fascinating:

Ashley Lutz recently wrote "The Stomach Turning Process of How Hot Dogs Are Made":

A camera crew from Discovery Channel's "How It's Made" stepped inside a John Morrell factory to reveal the process for how hot dogs are made.

It isn't pretty, as the photo on the right illustrates.  

The factory processes a mindblowing 300,000 hot dogs an hour. 

The recipe starts with beef and pork trimmings. Later, a whole bunch of other er, stuff is added.

Read more: http://www.businessinsider.com/how-hot-dogs-are-made-photos-2013-7?op=1

Favorite photos from Ashley Lutz's article involve the mystery meat slurry:

What would Emma Stone say?

Looks similar to mechanically separated chicken aka pink slime:

http://pandawhale.com/post/35590/what-mechanically-separated-chicken-looks-like-consumerist

I'll never look at Nostalgia Chick being pelted with hot dogs the same way.

Wait a second... http://pandawhale.com/post/31176/thats-a-penis-gif

The Simpsons explains the ingredients of a hot dog well, too:

Don't ask how sausage is made. http://pandawhale.com/post/27256/dont-ask-how-sausage-is-made