In part 1, the Iron Man disappears into the sea, but of his own will. In part 2, he disappears into the earth, but it is not his will.

https://youtu.be/aKgjZQYYR1E?si=31HNrJ1Srw2CIN0O

https://youtu.be/aKgjZQYYR1E?si=31HNrJ1Srw2CIN0O