In grass, I always "slide" it along the grass as close to the ground as possible without causing excess friction. For an extra 1/2 inch or so of depth,I use the "scrub" method, which is pressing the coil against the ground during my side to side swing. Scrubbing slows me down and also requires a little more effort, but more times than not will pay off on a couple more deep targets. Farm field hunting usually requires a little more coil height for me because of crop stubble and plowed furrows. Everyone has their own methods but I feel that if you are "pumping" the coil to ground balance, the coil should be "pumped" down as close to the ground as possible.