I want to know what the chain of events was that convinced this guy putting a sticker of a road sign on his car would look good. I guess 55mph just wouldn't look as cool as 300mph. But why stop at 300mph? Since you're already exaggerating I say put "Speed Limit 670616629mph".
I don't really know what to say about this, except that it deserves more comments. The Altezzas in the back really cheapen the look of the car and that "Speed Limit 300" made me nearly piss my pants in laughter.