It's Shocking...

...how many people make the same simple mistake that Iggy made. Its down to the bottom of Turn 6 and the other guys mum is waiting for him in the car. You have one objective while he has another. One of his Dakka Predators is within 10" of your scoring squad. At this point he can Tank Shock or fire the guns. What does he do? Obviously fire the guns at the full strength squad and hope to force a moral check. Wait what!?! They have a melta-gun in the squad. *facepalm* But why do hobbyists make this mistake? Who knows but we might as well look at the rules on page 69 of the Big Red Book...

If a unit has been attacked by a tank shock passes its Morale test, one of its models in the vehicle path can stand and attempt to destroy it rather than move out of the way (this is potentially a rather suicidal thing to do!)... If the model successfully managed to stun, destroy or immobilise it, the vehicle grinds to a halt directly in front of the heroic individual (or blows up there!).

- Page 69 of the Big Red Book

Bold added by me to emphasis just how misunderstood this rule is. Do NOT fear the power fist or melta-gun. And even if they are directly infront of you that doesn't mean the SINGLE attack will destroy your tank. Chances are you will grind to a halt infront of them and possibly contest the objective.

Edit - here is Brother Loring's look at the basics of  Tank Shocking over on the Pinktastic blog.