The Last Straw

We were having this rather heated debate about the presidential candidature of Mrs. Pratibha Patil and someone was jotting down everything with a pencil and paper. For some reason, it kept falling out of her hand and dropped down to the ground very frequently. Miraculously though, the tip survived all the crashes...
I was drinking some cola with a straw and as is my immature nature, kept fiddling with the straw throughout the debate.
Eventually, she put the pencil down on the table and alongwith the rest of us, took the opportunity to sit back and enjoy a heated argument between two of the participants. I was busy fiddling with the straw when it fell out of the bottle and rolled onto the table. It hit the pencil and took it along as it fell down. This time though, the pencil wasnt as fortunate and broke away in two pieces, right through the centre. This wasnt lost on the others who by now had an eye on the two of us dropping things continually. (The tip survived the fall though would you believe!) Well in either case, someone proceeded to comment rather wisely-
"That was the last straw that broke the camlins back!"