The snow day threw a loop into things

The speaker was giving a reason for postponing a task.  This is a mash up of  “throw a monkey wrench into the works” (cause problems for someone’s plans) and “throw (someone) for a loop” (cause surprise or confusion).  “Throw” is the common denominator and probably led to the confusion.  I must admit I act a little loopy on snow days.  Thanks to Marcia Riefer Johnston for sending this one in!