It's "I've ridden a horse" or "I rode a horse".

Grammar police, in full effect.

I read the newspaper -- No, unless Facebook or ESPN counts as a newspaper

Not including bugs, I've killed an animal -- Yes, I've hit both a deer and a whole bunch of prairie dogs in my days in Wyoming.

I've been put in handcuffs -- Yes, but not by the cops... :spin:

I've interviewed someone for a job -- Yep, just a couple of months ago

I've driven a motorcycle -- Yep, didn't die either!

I've been to a concert in the last year -- Yes, the 2nd grade christmas concert at my daughter's school.

I've been naked in front of a group of people -- Yes (I think I answered no in the poll), I used the shower after practice in high school with other people.

I got grounded quite often -- Nope, I never did anything so there was nothing to ground me for.

I've ridden a horse -- Yes, many times

I've participated in a charity event -- Yes, many times.