This is one of the methods I have considered in the past. Depending on the season, especially if it is late summer, this would be very effective due to hyperthermia, dehydration, exhaustion, on top of falling to death. In the event that the fall doesn't result in death, then dehydration and hyperthermia would finish one off.
However, since I have my method (shotgun), I would not resort to this as I am able to exit at any moment's notice.