Sea cucumbers move by tube feet which extend in rows from the underside of the bodythey use ttube feet
well that's a hard question. its all a scientific equation with the weight of gun bullet and length of barrel. it also has to do with add ons (barrel break merckury ttube(s) and butt pad) also lever semi or bult. on averiage a little less than a 12 gage straight out of the box how ever a semi autto will not kick as much as a single action. My Marlin Model 336CS in 35 Cal with the 200gr bullets has a surprisingly light kick