I love to be in the position of not knowing what I'm gonna do, but having rehearsed all of those so when something happens with the others actors I go with whatever that is I'm getting.
At practically every level, the way I make comics is an act of improvising within structural boundaries. There's a rough plan, with a beginning, middle and an end, but how I get from one point to another is unknown at the outset, and a large part of what keeps me engaged. It's an exploration for me, and hopefully for the reader as well.