Many years ago -just after I started riding-I went down a slope along the Seafront and my mate--Well I thought he was a mate--Told me to speed up and we would take the bike in front of us. So lots of effort and we passed him. Wasn't a bike- it was a moped. All I could think of till we stopped at the cafe was--I am knackered but I now have to stay in front of this bloke on an upslope and he has a bigger engine than me. Rest of the ride was done at a very slow pace.