Factual error: When the bikers are chasing the bus, one of them crashes into the "Now Leaving Texarkana" sign. However, shortly before this, we see Cyril crashing into the sign reading "Austin. 105 miles." Texarkana is almost 350 miles from Austin.
Factual error: After Archer disguises himself with Pinky Brewster's clown costume, he racks the shotgun, but no shell ejects. Okay, fine, the weapon was not loaded, now it is. When Archer, still disguised as Pinky Brewster approaches Pam and Cheryl, he racks the shotgun again. This time a shell should have been ejected, but it isn't.