When I did an unfamiliar area near a ravine, a blanket of weeds were 6-7 foot high, I went backwards, very slow, and kept looking behind and down into the slot between the wheel and mower, hoping to see a hole, rut or dropoff before a wheel could drop into it. Of course roll bar was up and seat belt was on!
After I got the lay of the land down the fun part started and I proceeded forward with FEL down low as stated by others.