It's pretty tough to mow down the cord with a TV [Linked Image]
IMHO at least modern lawnmowers aren't that dangerous because they have insulated handles. However, cutting the cord is still dangerous as you get exposed live wires, risk of a short, let alone the risk of DIYer patching the cord by twisting the cut conductors and wrapping the joint with some shoddy tape. That's again shock hazard (Such a splice can pull apart, lawnmower cords are often exposed to severe mechanical strain) and probaly also a fire hazard becuase twisted joints offer higher resistance.
From a non-electrical angle such a beast has sharp blades that rotate pretty fast so don't ever try turning it upside down to remove something from the blades or whatever.
A TV can only fall on your toes if it isn't supported properly.