What is your expected response here? It seems like a valid answer is that you could move to the left, right, or forward. The only way you can't move is backward

What is your expected response here? It seems like a valid answer is that you could move to the left, right, or forward. The only way you can't move is backward (since you'd run into Bob). And maybe forward is a sub-optimal direction if you expect Bob to lunge at you longitudinally. Personally, I'd suggest dropping to your knees in a "table" position so that you surprise Bob and he trips over you. We used to do this in middle school when someone was chasing us, it was hilarious.