Do You Know How Fast You Were Going Sir?

So after an amazing B-Day, and night :), i am skating down Main Street in Mammoth from Canyon's Lodge, when a cop pulls me over at 11:45pm
and says "do you know how fast you were going!?!"
Ianswerd with "atleast 40mph"
he says "thats close! you were doing 42mph!!! in the dark!!!"
He let me go with a warning and said to stay on side streets at night and to slow down!
made my night haha