I remember one sort of odd instrument approach with a new copilot on the metroliner back in the middle 80's. (VOR apch to opposite end airfield instead of ILS to normal runway)
After we landed, I looked at him and said, I'd rather have another 170 pounds of fuel than you in the copilot seat.
He said he had been on reserve and hadn't flown in awhile. I said: great, you should have memorized every procedure in the book, but instead you probably were just sitting around goofing off.