Perfectly legal (although you're likely to draw intense ire from people behind you if you try it in a lunchtime lineup, since you don't actually have to leave t

Perfectly legal (although you're likely to draw intense ire from people behind you if you try it in a lunchtime lineup, since you don't actually have to leave the counter in order to create a separate transaction). Oh, and it won't work in a drive-through (not because there's anything wrong with it as such, but that ungrouping the orders makes fulfillment a pain in the butt, so restaurants usually won't do it as a matter of local policy.