They laughed and called him a squint-a-pipes when he kept squinting at the map.

In grammar class, we learned that squinting modifiers can make a sentence unclear because it's not obvious what they modify.

In the grammar workshop, the instructor identified the phrase as a squinting modifier that could apply to either the clause before or the clause after it.

Even after losing his glasses, he would squint like a bag of nails to read the tiny menu.