It's not unusual to find that a lot of the missions might have a mutator active to alter the gameplay in some interesting or radical way; for example,
falling snow balls that temporarily freeze whoever they land on, or a health bar that starts at zero and slowly increases until the opponent has landed the first punch (that's a tough one).
Not exact matches
I brought leaves to the classroom during
fall, used cotton
balls and white paint to re-create
snow in winter, and ordered caterpillars — watching them cocoon and emerge as butterflies — in spring, but that was the extent of Room 302's science curriculum.
A
ball of feathers fluttered wildly and
fell to the
snow, flinging flecks of blood and down in every direction on the whiteness before it lay still and died.