I do not know how much useful will lay out this bug, but has decided to lay out.
Textural error.
Multiplayer mod game.
The enemy "twitches" after death.
The second player did not see the character after him have killed.
game ver.:ufoai-2.4-dev-1301086950-Debug-pentium3-O1-sse-7z-full-win32
Link to video
http://www.youtube.com/watch?v=7LpP4dghJkc