Buffy gave a frown. If they knew she was a Slayer, they would have let her go immediately. But she had to play the injured civilian role, and that being the case, she had to stick around and eat crummy food and listen to annoying beeps until someone like Xander came along to help her out. Hospitals creeped her out on top of everything else, seeing as how she didn't have the best history with them by far. So getting out of there was top priority.
"Check and check," she replied distractedly. "Now can we get out of here?"