So how well did the 9/11 jumpers fly? Pretty well, but they need to improve their landing.
I'm not sure what you meant by that; can you please explain further?
Are you dumb, it was a joke about 9/11.
Joking about 9/11 is akin to trivializing the deaths of the people in the tragedy. How would you feel losing a loved one and someone made fun of their passing?