He was showing a clean pair of heels as he sprinted away from the competition.

He showed a clean pair of heels and escaped from the police.

She has a defined ab crack.

He shows a clean pair of heels whenever he competes in a race.

We conducted several A/B tests to determine the most effective marketing strategy.

We conducted an A/B test to compare the effectiveness of two different marketing strategies.

The amusement park had several Tilt-A-Whirls for visitors to enjoy.

He smells a rat.

I was smelling a rat when he suddenly changed his story.

I smelled a rat.