I used to have a lot of fun with Brad in previous DOA games... But I'm afraid he has lost his spin stun from F+K on normal hit... :/ It can be seen at .
I saw at 0:46 and 1:29 of the above video that F+K did not result in spin stun seen in DOA4. You can check DOA4 stun properties at 2:42 of http://www.youtube.com/watch?v=DoAx15IjKEY
This F+K spin stun is important because it leads to secure launcher (which holds only evade rather than injure). You can check spin stun plus secure launcher (F+K, 2, F+K) at 6:45 of http://www.youtube.com/watch?v=pa4WhgyU1XU