Possible Clues:

• Amazed not to be starting together
• Could hardly stand one deer - Gee! - and another deer in bits
• Bowled over but not all at once
• Was one buck with greed before the fall
• Bad grades get evenly distributed
• The buck nearly fell for greed
• Did floor, but not all at once
• Lurched, as hunted animal, say, upset and bloody
• Gobsmacked
• Astonished