I had an ATA FA put turbulence into perspective for me once. I was in the window seat exit, across from the jump seats, and we were chatting. The wings were bouncing like I've never seen before as we descended towards MDW. I commented on it and he laughed and said, "I did a military charter into Iceland once, and that it NOTHING! Even I was amazed at just how much give those wings have; I saw them stressed to the max on that Iceland flight." Not something I'd want to see personally, but it made me feel much better about "normal" turbulence.