I had a flight attendant come back for the preflight questioning of the exit row patrons who asked if I knew how heavy the window exit was. I said 39 pounds (I had already red the placard).

A lot of technically disabled folk I know are going to have that window open and out faster than the alleged able-bodied ones.

As Mitch Hedburg said, if you are flammable and you have legs, you are never blocking the fire exit.