I'm about 6' tall, even. In some cattlejets, my knees physically touch the seat in front of me. A lady on a recent flight flung her seat back and I cried out involuntarily in sudden pain.

I understand why she wanted to lean back. And yet, when she did, it freaking hurt. I'm around the 80th percentile in height in the US, and while my doctor says I could lose a few pounds, I wear a men's large shirt so I'm not exactly enormous. Even though they seat can technically recline, you cannot convince me that they're actually meant to.