It reminds me of an old Soviet construction joke:
A wall collapsed at a construction site... A commission is appointed. The commission asks the brick:
-Why did you fall?
The brick answers:
-I held on as best I could, to all 150% of my strength, but I couldn't go on.
They ask the rebar:
-The rebar, why didn't you hold the wall up?
The rebar answers:
-I, I held as hard as I could, to all 200% of my strength, but I couldn't. 
Then the commission asks the cement:
-Cement, why didn't you hold the wall?
Cement answers in astonishment and indignation:
-Why me?! I wasn't even there!

Answer, using modern slang, that it is