Commando Comic #657: 'The Ship Busters' (1972)
 
The crew of a German battle-cruiser watched as the lonely Halifax bomber flew high overhead, letting go a single bomb. But they saw that the bomb wasn't anywhere near them. It was going to miss by a mile. The mighty ship sailed on, and the crew sighed with relief.
Then relief turned to horror, for the bomb had turned. It had started to chase them!