Inspired by the end of 11.04 - I was surprised the writers didn't take the opportunity to use this old science joke :-) Everything belongs to Chuck Lorre and friends.
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In the passenger seat of his own car Howard almost screamed at Sheldon "Slow Down, you are way over the speed limit, do you want to meet a traffic cop?"
10 seconds later they heard the sound of a siren and saw the flashing lights, Sheldon said "too late".
A couple of minutes the traffic cop spoke to Sheldon
"Do you know how fast you were going?"
"No, but I now know where I am!"