Let's Joke Around! Round 2!

Hello everyone! It's lunchtime, how are you all doing?! I'm Komeko, an ordinary Playio user who created this 'Let's Joke Around' board! I'm truly grateful to have reached our second round thanks to all of you… Actually, it feels like we've done this a hundred times even though it's only the second time! I just love jokes and witty retorts like this! I was recently browsing YouTube and found a funny manga called 'Samuwan Hertz' from Jump. You might think it's a typical rom-com, but just when you think that! The manga is a storm of hilarious jokes and witty comebacks, just like professional comedians! I've only read the first three episodes on the official YouTube channel, but it's incredibly funny. I especially found the exchange, 'Our adventure starts here…' followed by 'No, don't cancel it!' to be exceptionally amusing. The shock of seeing a man and a woman doing this! Perhaps influenced by that, I felt like doing something similar, so I'm talking about it in a radio style! Well! With only a little bit of text left, it's time for me to bid you farewell for now. The theme for this round's joke is: '"Ah, this hospital is run by a quack doctor." What kind of sign would be displayed?' Feel free to add your thoughts to your jokes, so please come up with as many as you can!