Great!
I love the suit-up, you did a great job of getting the parts to fly and attach on smoothly.
The twist was ok, it wasn't really expected, but it wasn't that funny. Although the ending with the robot was a nice touch. My main gripe this time is the music.

It hardly ever changed, didn't really get any more upbeat or exciting, and doesn't really fit the character of Iron Man very well. It would have been fine for the opening, but it got old pretty quick.

The animation is good, the sound is nice, and the set, while just a bit too clean, plain and sterile, was done well.

This could have been really good, but I feel the build-up was better than the punchline, and the music slowed things down.  The "Hey" is a bit out of place, since no other speech is uttered, and the rest is just grunts. There was a bit of light-flicker, but it's not that noticeable in the grand scheme of things.

Not bad by any means, but it has a few somewhat crippling flaws.
3/5