I love when we do our daily scrums and one of the PMs (we have three: one – who actually functions as the PM – employed by my company; one employed by the prime-contractor and one employed by the end-customer) decides to pull up the burn-down chart. Invariably, instead of the line sloping downwards, it's either flat or rising because they keep adding tasks to the active spring.
I mean, great that you're keeping us busy. And, I'm sorry that several of us are fast enough that we burn through our initial assignments, but if you're not going to task appropriately at the beginning of each sprint, it really doesn't make a ton of sense to keep looking at the burn-down chart, neh?