Don't even ask why I was watching the Cheaper by the Dozen remake on cable. I could only take a couple minutes of it, and this scene was completely out of context, but what fruitful minutes they were.
One of the gazillion kids comes into the kitchen and then pukes when he sees a protective cup drenched in tomato sauce and thinks it's blood. Odd humor for a family movie. But then another kid comes in and barfs from seeing the original barf.
Ah, chain barfing is the best. I vaguely recall an over the top chain barf scene from Stand By Me. But that was pies, not jock straps in the marinara.