Worst sequels of all time?

I absolutely love Robocop, and I enjoy Robocop 2. Ive never watched this, but I figured I would just because. I made it to 17 minutes and was going to turn it off, but I didnt even see Robocop yet. Once I saw him I shut it off.

This made me think, what are some of the worst sequels of all time? Would you that have watched this movie in its entirety put it on that list?