I thought a fast 25 min run in the early am followed by trailering Thing2 to her daycare (and returning empty trailer home) would keep me from getting too rabbitty on my wife during the commute, but I still wound up zipping up a couple hills and waiting for her at the top. It was never too asocial, and it kept us both at a conversational level of respiration for the 80% or so of the ride we were keeping the same pace, so I think it still worked out OK.