LEG ATTACKS FOR STAND UP FIGHTERS:
Karateka, Jeet Kun Do, Muay Thai and
other traditional styles: In the picture below you see a
finishing leg lock move off of a traditional punch/throw attack.
The thing that makes this move different is that the foot is attacked
immediately after the opponent hits the ground. Lets be honest
about this move.... it is not a high percentage submission move
in itself. 
The
beauty of using this move is that it moves the opponent into other
higher percentage submission moves while you remain pretty much in a
dominant standing position. For
BJJ opponents it is important to not get into a foot fighting game
where the BJJ opponent is maneuvering you with his feet from a open
guard position.
One
way to do that is to clamp the ankle and foot firmly on your
hip. This prevents him from using many open guard moves.
This move is really a submission move where you have knocked down the
opponent but do not want to go to the ground. (Example: In
a bar, the street or other street/multiple opponent situation.
Something different from the staff.
TRAIN
HARD......DON'T TAP
