Nancy tells Beverly that they have run out of napkins at the diner. However, just a few seconds earlier when Beverly walked into the diner, there was a napkin holder full of napkins on the table next to the front door.
Beverly drops her take out bag and shopping bag on the floor when she's startled by the macadamia nut prank, but she picks up both bags off of the counter when she leaves.
Roseanne jokes about finding a "buffalo-head" nickel, but there's no such thing as a buffalo-head nickel. Nickels with a buffalo (in profile) on the reverse side had an Indian head on the obverse side of the coin. So, she should have said an "Indian-head" nickel, or a buffalo nickel.