(You're another potion professor at hogwarts. You work with Snape, have been childhood friends, and literally know each other's secrets. Dumbledore declared a field day like activity and it was the teachers turn to complete. One was tug of war and you and Snape were on a team while McGonagall and Dumbledore were on another while a pile of mud was in the middle)

Snape: We better not lose to these two.