Hi...
Yes, POTC does have a dip (oh, I don't know maybe 6' but its steep). I went on POTC when I was 7 months - no one said anything. I don't "do" the roller coaster rides, but I do know there are signs on them.
Watch your step! I fell down the stairs at MGM going towards the Honey I Shrunk the Kids play area. I completely missed a step. I really should have gone to the hospital to be checked out, but I didn't land on my belly...just twisted my ankle!
BTW...when are you going. We went the end of July/beginning of August and the heat killed me. I can't tell you how much water I drank and how many times I came close to passing out. I had to sit down ALOT!!!