Behind the ear, the colar bone, kneecaps, are also nice targets. (good thing Nancy Kerigan didnt get hit with one of these.
)
Realy almost anywhere on the head is good. Geting hit in the melon causes your brain to slosh inside your skull, resulting in "tweetybird land".
My Great Gramps was a small guy, who had a reputation for being able to floor someone twice his size.
He simply lashed the handle of a sap to the inside of his wrist. Its an Irish Martal art secret
. He also cast Egyptian curses on his enemy's
I think it would be an ideal countermesure for a "chemically fueled" attacker.