Mad Business
When your business is so intense it could make a dragon lose its temper and a wizard forget his spells.
My boss called me during my lunch break. It was mad business. I had to answer or I'd get fired.
My dog ate my homework. That was mad business. I had to redo it or I'd fail.
My phone rang during my nap. That was mad business. I had to answer it or I'd be groggy.