Possible Clues:

• Missed the mark sending English reverend to East Germany
• Dived into an empty pool, e.g.
• Did a human thing
• Red Queen swapped places and proved she was human?
• Made a muff
• Flubbed a fly
• Was a boob
• Having done wrong, about to turn red
• Hesitantly stated colour of Santa's hat and was wrong
• Bungled