I love their "We can do it, you better believe it" attitude and their humor.
"Size Matters
In order to carry on a useful conversation about asteroids, we have, for our own purposes, developed a workable set of descriptions. The terminology may not be perfect, in fact there are exceptions and anomolies in each set and definition, but it is, as they say: “close enough for ‘rock’ and roll.”
10,000+ meters: Huge
An Earth impact would be an “Extinction Level Event.” Call Bruce Willis and Morgan Freeman… “Game over Man!”
3,000+ meters: Very Large
On the verge of being itty bitty semi-planetesimals. If one is coming call your mum, write your will. The last day of life on Earth. An Earth impact would be a major civilization destroying, climate changing and devastating event.
1,000+ meters: Large
(The ones we can see if they are favorably positioned, at least in principle).
Still a DeathStar. A billion+ tons. A very bad day for life on Earth. Devastating, climate changing, city destroying if they hit. Also could be hollowed out and rotated for a cozy little space colony.
300+ meters: Medium
50-500 million tons. Note that (with few exceptions) these will be rubble piles. Major calamity if in populated areas. Easy to grab pieces for mining and use. Good for hiding from Darth Vader and Reavers.
...
10+ meters: Tiny
1,500-15,000 tons. Size of a building. These are completely harmless! One burns up annually. (Make a wish! But don’t stand under them – just in case.)
3+ meters: Large Boulders
(50-500 tons). The size of a bus. One breaks up in the atmosphere every month.
1+ meters: Boulders
Less than harmless. Not exactly “cute” like pet rocks, but close. 1.5-15 tons.
Note – We really need to get out there and find them all…." XD