Having gone out for a large lunch with fellow workers, a secretary from our office who runs regularly was especially motivated to get to the gym after work.
Our boss, who had also enjoyed the good food, suggested that she run an extra lap for him. As she was leaving the office, she called to the boss, "Get ready to start huffing and puffing, 'cause I'll be on your lap in half an hour!"
This time, realizing what she'd just said, her face turned red *before* her workout.