I've always disliked TGIs... but I have to come to defense a bit..
Firstly, this type of thing obviously was not deliberate.. so I'm guessing that it might have had something to do with the broccoli.
My guess, is that they use frozen broccoli which come in pre-cut bags. What I'M going to guess happened is that a snake got in the machine of the broccoli cutter and had an unfortunate incident..
If this is what happened, it could have happened anywhere. Do you know the possibilities of what could be pureed into ketchup?