Where's my teleprompter?

The Politico weighed in on President Obama's tone for his big Copenhagen speech:

COPENHAGEN — A visibly angry Barack Obama threw down the gauntlet at China and other developing nations Friday, declaring that the time has come "not to talk but to act" on climate change.

If Obama was angry, perhaps it stemmed from the fact that he apparently had to speak without his teleprompter. Note the triangular pattern he used instead of the usual tennis-watching right/left bounce.