Both videos are with my system in (about 100 pounds), and some tools in the back seat (about 50-60 ponuds).
This video is with a passenger also, it is a roll from 10, the vibrations were me hitting i believe some of those strips to measure how many cars go across that road
Click here to watch 10-roll

This video is with no passenger at night from a 20 roll to the top speed limiter
Click here to watch 20-limiter