I've been riding numerous times with my bike shop manager friend. Every time we see a rider or a group ahead of us, or behind us, we uncousiously speed up! I notice that we hold a pretty steady pace, but will increase at least 2 mph every time! I asked him about it and he didn't realize we've done it!
L8R
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"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming, "WOW, What a Ride!" - unknown
"Your Bike Sucks" - Sky Yaeger