Attacked by the school bully, the backpack fell from Abner’s shoulder.
A dangling modifier is a modifier that has nothing to modify. Abner was attacked by the school bully, not the backpack as the sentence suggests because of this error. In other words, we have here a dangling modifier or misplaced modifier (Attacked by the school bully).
Jeremy spent all weekend cramming<span> for a </span>test<span> on </span>time management<span>. When </span>he got<span> to</span>school<span>, </span>he realized<span> the </span>test wasn't until<span> the </span>following week<span>.</span>