1)There are two ways that this glitch occurs but all issues occur when servers are "Rubber-Banding" or simply "Laggy" and will also occur less frequently on normal "Low Ping" servers...
1A.)Travel to an area where you can find a "Cliff Edge"...
or
1B.)Travel to a Castle and climb one of the outer edge staircases...
2A.)Walk out to near the edge ,but not too close to the edge, and walk parallel to the cliffs edge and if done correctly then there is a high but random chance that the server lag will throw you off the cliff "You Are Dead"
2B.)Same thing as above(2A.) travel up the staircase walking parallel to the edge and then walk back down the staircase... If done correctly then there will be a small but random chance that you will teleport to the base of the stairs with your limbs broken or a slight chance you will simply die.