You could kill the world using esxtop.
1) Connect to your host via SSH and use the esxtop command
2) In esxtop, press V (case) to view the VM's
3) Then press f for fields and add LWID (Leader world ID) by pressing C one time. Then enter to go back to esxtop.
4) Press k and give in the LWID to kill
5) After a few seconds, the VM should be killed.
Hope this helps.