Lorry training aids

Took long way to work, 13 miles 48 mins, got training gizmo working, all I know from that is that my average HR was 122. Cadence etc is yet to be established. Used a lorry as a training aid, it appeared on my shoulder as I was giving it some on a very steep hill. Potholes meant I used the whole road, with lorry adding incentive I made the hill at 13mph, by the time it passed me on the flat, the very flat bit at the top it was all I could do to keep my balance and maintain 9mph. Lungs and legs completely blown. Recovered, average speed overall 14 mph. Lovely bike ride.