Possible Clues:

• Like __ of bricks (heavily)
• Many, many
• 2000 pounds?
• 'This must weigh ___!'
• ''This weighs __!''
• Super-often
• Flaming Lips "A Spoonful Weighs ___"
• More than enough
• '... hit me like ___ of bricks'
• Quantity of bricks that one may be metaphorically hit by