I like the "Keep honking, I'm reloading" one!
There's a couple others I find funny:
"Too close for missiles, switching to guns"
"Praise the Lord, pass the ammo!"
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"You must be fast 'cuz I was haulin' ass when I passed you"
1999 Blue/White YZF-R1: 2 Bros. C4 exhaust, Dynojet jet kit, timing tricker, dyno-tuned by Graves
2000 NBM/Lt Oak int/Blk top C5 Convertible - MN6, Z51, Vortex Rammer, A&A Exhaust, C/R X-pipe, Corsa tips, !CAGS