Scrum (chicken and a pig)

During Jazoon 2010 I had the chance to chat with many people about Scrum and this motivates me to look around and check scrum.org website and found this quate on the guide

“A chicken and a pig are together when the chicken says, "Let's start a restaurant!"
The pig thinks it over and says, "What would we call this restaurant?"
The chicken says, "Ham n' Eggs!"
The pig says, "No thanks, I'd be committed, but you'd only be involved!"