In the security line at the airport.
We happen to have to fly home from Las Vegas the same day some guy in London tried to smuggle liquid explosives onto a plane. They were allowing absolutely no liquids through security, so pumping a bottle wasn't an option. It was so, so very hot in the airport. There was a 1 1/2 or longer line for security that day. The line snaked back and forth through the airport. And, the air conditioners for the airport were overloaded by all the people standing there. It was so bad they were handing out bottles of cold water. And, after about an hour into this, my then 3 month old DS decided he needed to nurse. I wasn't about to step out of line. So, I put my coverup on and nursed him. I was about ready to kill anyone that gave me an odd look or said anything. No one even batted an eye. They were probably all just happy he wasn't crying.