Can't laugh at that. I did it once, though not looking quite so fetching. L89 (427/435 hp) Corvette that had been sitting. I did a careful routine for sleepers, then was ready to add coolant. Poured a cup or two before I realized that jug had old motor oil. Duh. A few flushes later and all was well. Since then (40 yr.?) I only punch 2 small holes in the foil while a jug has coolant. No foil may mean motor oil, other waste. What a moron.