Tell them why they SHOULDN"T DO THAT!

How to play:
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[p1]: I went to the store.
[p2]: You shouldn't have done that because the store was closed. I went to get ice cream.
[p3]: You shoudn't have done that because it wasn't cold. I went to sleep.
ETC.

I will begin:

I went to buy a rug.

You shouldn't of done that because the price is $9999999.9999999

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I went to the gym.