Gaston tells Le Fou not to leave Belle’s house until Belle and her father return, and a frustrated Le Fou kicks something nearby and a large amount of snow then falls on him.
The next time we see Le Fou is when Belle is helping her injured father into the house and Le Fou is now in the form of a snowman.
This is what Josh Gad told People he wanted to do in the live-action Beauty and the Beast as well.
In the original animated film, Gaston hatches a plot to have Belle’s father committed as a way to force her to marry him.