When I Walk The Ground Shakes . Check the ground you are going to park on first before backing into place to make sure it is solid enough to handle the weight of the rig. I tell my husband i know it sounds crazy, but it feels like the hum in. The Jacksons Shake Your Body (Down To The Ground) (Live) Lyrics from genius.com Thanks for your input @user37996. When evaluating a floor for vibration perceptibility, the designer should assume lower floor loadings than are required in designing for structural strength. Take me to the crush.