I did a couple of epic fails trying to land a few punches on it. First punch I tripped over and missed it completely and the second I kind of scraped it with my knuckes and miss hit it.
My brother told me stop at this point to save me from further embarrassment :-(. He had a couple of shots and scored through the roof and hit it with such force everyone stopped to pay attention.
Funny thing is I'm always working on my techniques at home on the punch bag and send the bag back and forth.