AI can midlessly follow the player off a cliff
There is this nice feature in OpenMW, that NPCs and creatures can actually follow the player over obstacles (small rocks etc.), because they can simply jump off of them. The problem is that they don't take into consideration the depth they're going to fall into. So, for example, when you lure the NPC on a high cliff, you can simply run and jump off of it and fall into water, but the NPC won't jump, it will just mindlessly fell off of that cliff, hitting the rocks below, resulting in their death. Surroundings of Gnisis is a good are to test this behavior.
There should be probably some precaution that won't let the AI deliberately fell of of large heights and killing themselves.
(RM-3247 from redmine: created on 2016-03-13 by Lord Berandas, , closed on 2017-06-09 by nobody, duplicates #1997)