Years ago I was on a TW DC-9 that had a wingflap malfunction on takeoff. The plane took off from STL at a very funny angle, circled around, and landed again almost immediately. I was 12 years old and I was on the last leg of a 15+ hour journey home from Italy, so I was half-asleep when it happened. Although I felt the unusual angle of the takeoff, I didn't realize what had happened until we landed again and I looked out the window to see STL instead of the MLI I was expecting. Then the pilot made an announcement.

I also very vaguely remember some sort of enginge trouble in a TW (or maybe Ozark?) DC9 in a separate incident, although I was probably no more than 5 at that time, so all I remember is that we took off and landed again (in STL), and that my parents were pissed about the delay.

Ah, childhood TW memories...