sound from below

Hello friends, I have been coming under my car for the last 2 weeks. Sounds are coming in a little shaking. Sounds are not important. Speed does not matter. Low speed sounds. I do not have the opportunity to shiver at the speeds after the next time.

Did you enter the pit hard?

It didn't happen when I was there, but sometime my brother said he hit the hole, but he didn't say he was hard. What happens with hitting the hole hard?