Overhand counter to a low or uncommited lead

This is an example of why not to do something. The example shows why you should keep your jabs (or backfist, eye jab, lead palm, etc) high, aimed at the head or eyes, and raise the elbow for cover. Remember, the lead is what closes the gap. It is covering fire to move your other weapons into position to do more damage. The problem can come when you lead improperly, and then all your "best-laid plan" are neutralized by the easy timing counter. Take a look:
[Click photos to enlarge]
1. The lead-off fighter (on your left) begins to lead.
2. Notice the foot moves before the hand, allowing the counter-fighter to anticipate the attack-you can see his lead foot come forward a little, allowing him to put his weight into the counter.
3. The lead. Notice it's low, and the lead-off fighter's weight hasn't shifted. This indicates the lead is tentative and uncommitted. It doesn't warrant a good defense because it (a) won't penetrate, and (b) won't do much damage. It doens't demand respect.
4. The lead is low, leaving a nice opening over top of it. The counter fighter has done a snap-back (see rear foot), by stepping back slightly, while keeping his weight forward. He begins to fire even as the jab is still out.
5. Where is the rear guard? There is a clear path for the counter right. This is where keeping the elbow up and the punch high provide the cover we mentioned above.
6. Completion of the counter. Notice the lead-off jab was withdrawn low, which contributed to the opening for the counter-right.