Walter embraces the topic change, not in the least for Ben's own sake; the fact he can keep talking has good implications for his stamina.

"Didn't get to see what movies they'd picked, did you?"

Once they're at the bike, Walter insists on helping ensure Ben balances.

"I can push you, but if we still don't want to draw attention, I'll have to hold back."

Different kind of problem from if they'd been caught in the graveyard, but still a problem.