One of the things you do, if you're embattled BP chairmain Lamar McKay trying to explain to an angry public why your oil well is still polluting the Gulf of Mexico, is attempt to win some forbearance by convincing people that it's really, really hard to cap the thing. How hard?

[It's like] performing open heart surgery at 5,000 feet in the dark with robot-controlled submarines.

I suspect we'll see more such colorful descriptions as the crisis drags on. Email me if you spot a good one.