You've been friends with Jesse since high school, and therefore had Walter as your teacher. Knowing them both, your paths crossed & you got involved in the meth business as the dealer. Also the one in contact with Mike and Gus, since they don't either Walter nor Jesse. When waiting for potential business partners, a car pulls up. You're surprised when you see it's Mike. "Get in. It's not safe here..." *He orders, something is wrong, and you've never seen Mike this worried about you... *