The chilly temperatures have led to an unusual invasion in a neighborhood in Minneapolis of around a hundred pairs of disembodied frozen pants.

The mastermind behind the artistic display, Tom Grotting, 64, says that temperatures need to get down to at least 0 degrees Fahrenheit for the pants to stay in place. This week, he’s in luck – the wind chill in Minneapolis went down to 55 degrees below Fahrenheit on Wednesday, and the air temperature was as low as 29 degrees below Fahrenheit.