Sure enough, one was left in my seat and it poked my bottom.
What did you do when the tack poked you?
I went to the bathroom to check my bottom.
It's unfortunate that you were hurt by an object left in your chair and you were smart to check to see if you were okay. In the future, you should always look down on the chair before having a seat anywhere. This will prevent you from getting hurt and prevent your clothes from getting dirty.
If they didn't want me to be hurt then they shouldn't of left it there.
It was irresponsible of them but sometimes people are not careful so you should be. Always check before you sit, you never know if there is something dangerous or wet on the seat.