I have long hair too, and last week, my instructor was demonstrating a hole in a pin, and how to close it. I was on the ground, his knees on either side of my shoulder and he said, "She can get up from here..." I tried to get up to illustrate his point, but couldn't move my head. Me: "I can't, Sensei." Him, looking down at me: "Yes you can. Just roll away." Me: "No, Sensei, I can't. Not when you're kneeling on my hair." Everyone laughed.
... I guess you had to be there.