Normally, I've never had a cop bother me with this.  I like how jimmyjam got one, lol.  
I'd just tell the judge... I have a 2.0L 4 cylinder engine... exhibition of speed?  My engine's so puny!!  (quick... hide the turbo!)  
I'm sure a few of the car nuts here on ATOT would agree with that "if I was REALLY exhibiting speed" comment.  A typical police interceptor can't keep up with a Maxima (go Skoorb!) let alone something even marginally faster.  
Besides, I've RIPPED the car out of a stoplight before right in front of a cop.  Right to the speed limit... they were tailgating me and I didn't want him riding my @$$.  My cornhole was aching because he was riding it so hard.