Have you ever?

Yes. All the time  

Have you ever slid or rolled down a hill/ grassy slope?

yes.
Have you ever fallen on your face?

haha, you keep making me think of the literal vs figurative.

no (but yes, figuratively!)

Have you ever had a pie thrown in your face?

No.
And I was being literal. LOL
Have you ever given a child cookies before dinnertime?

No, but I allowed it after said child helped himself

Have you ever said "eat everything on your plate before leaving the table?"

yes

Have you ever left a ladies room only to find toilet paper streaming behind you?

No

Have you found out your skirt was tucked in your underwear?

No.

Have you ever left a forum on which you were once an administrator?

no

Have you ever sent flowers to a man?

Yes
Have you ever done something you did not want to and then were glad you did?

Yes.

Have you ever stayed past the end of visiting hours in a hospital?

Yes
Have you ever turned something over to your boss just because you simply couldn't anymore?