Future Engineer:
"I better go and study so I don't make a fatal error someday and blow up hundreds of people--like designing a jet engine out of magnesium. (magnesium is extremely flammable, people) HEY! I'll just send 'em to YOU! (referring to the Future Nurse below...)"
Future Nurse:
"Well looking at my quiz scores today in my nursing classes...I'll probably end up killing all of the wounded passengers instead of saving their lives."

Future Musician:
"And I'll play taps on my trumpet at the passengers' funeral. "
{Silence.}
Future Musician: No, seriously. Please don't study. I need job security.