If a unit passes its Morale check against Tank Shock, any troopers from the unit who are in the vehicle's path can stand and attempt to destroy it, rather than move out of the way. This is potentially a rather suicidal thing to do! Each model nominated for this heroic duty gets one attack at the tank as it heads towards him.
The attack can be a single shot (one shot, even if Assault 4) from a weapon carried by the model or a single close combat attack using any weapon carried, including krak grenades and melta bombs. The attack hits automatically – resolve the hit against the tank's Front Armour immediately. Then, unless the attack has destroyed or immobilised the tank, the Death or Glory boy is crushed to death by the tank grinding over him – the model is killed regardless of Wounds or Armour (Invulnerable or not!). A crew stunned or shaken result has no effect in this case, but a weapon destroyed result will carry over.