So yeah, I was about to drive my girl home, so I reverse my car, then I started to hear this noise, similar to driving over a plastic bottle or something. So I went forward and the noise went away. I pulled a U Turn and saw that there was no bottle. I think nothing of it because as I was driving off, I did not hear the noise again.
As I dropped her off, her house is on a small incline by the way, so my car rolled back a bit before I left. The noise came back, I was like WTF.
I went home, check underneath my car, and guess what? One of my Under Panel is falling off. It is the one that is usually taken off when changing oil. Freaking Toyota!!
So now I am driving with 1 less Under Panel