As long as there are no raised spots in your wire you have no need to worry about people tripping over it, and in most conditions the wire should be completely hidden within 7-10 days. Don't worry about your lawn equipment cutting the wire as the blades will never be near the wire. Most lawns are trimmed at 2" - 3" inches,above the ground, nowhere close to the wire laying flush on the ground. Areas with cattle and livestock are recommended to bury the wire because hooves can create breaks in the wire if it's stepped on.