AWKWARD ZOMBIE

The joke I posted just simplified it as jerk is the derivative of acceleration, just as acceleration is the derivative of velocity.

http://en.wikipedia.org/wiki/Jerk_(physics)

I peeked at the wiki a bit, it is apparently useful in engineering and manufacturing. Makes sense for roller coasters, not only do you need to worry about the acceleration, but you also need to worry about how the acceleration is changing.
"never used" is quite the exaggeration.

Huh, looks like I was completely wrong. Learn something everyday.

Still think it's an overly complicated joke.

Exactly the kind that should be on xkcd.

I already knew what jerk was beforehand, so I got it right away. Jokes are no fun when you have to do research, I agree, but I was hoping someone math/physics savvy would know what it was. Maybe I hang out with engineers too often.

Besides, I just found it on Google images. Shrug.

Tomorrow night the perigee is happening

supermoon guys, go look at it.

For science.

Like in the Recess movie?

Test tube baby: http://bit.ly/13V60OO
Artificial heart: http://nyti.ms/18WdNxW
Exoplanet: http://bbc.in/13DOAHB
Planarian worms: http://bit.ly/1b1onEu
Gene therapy: http://bit.ly/16xDZZt
Star birth: http://bit.ly/130nzX4

We really could use a better system for replacing organs than donors. Thank you science.

I thought artificial hearts were already in use? Or did I just watch a movie with that and then confused it with reality?

It was invented a while back but only now approved I think.
Stuff takes a while for safety testing because potentially dangerous.

pfff nah, just replace people's hearts and watch to see what happens.

I can't wait until we can just replace our everything with roboty goodness.

Yeeeees. We will all be upgraded.