Jen: I wonder how they figured out they could do lasik eye surgery. Do you think they tested it on someone who was practically blind and had nothing to lose?
Dave: I guess they tested it on rats.
Jen: How did they know the rats were near-sighted?
Dave: I guess they were always bumping into stuff.
Jen: I would not want to do eye surgery on a rat.
Dave: I would not want to be a rat.
