Use "plunk down" in a sentence

1. The wide white bed invited me - no begged me - to plunk down and faint, but Harry was not quite through with me

2. He would run into Bullet up here, might even plunk down next to him and have a beer or three, and still, a certain inwardness obtained

3. It's ironic that hedgers, who have inside information, are not fully confident about prices, while crowds of cheerful outsiders plunk down money to bet on futures

4. What would you do? Would you plunk down the whole ten grand as soon as you got it? Or would you keep it in a more secure place and invest $1,000 a month over ten months? Or $50,000 over two years? If the market keeps going up and up, you might lose out on some gains