Carina attempts to reverse engineer a solution

Here's a description of the contestant's attempt. Someone's probably working on collecting some images to illustrate it.

Carina immediately despairs over the task, as she did not perform well in chemistry in school. Carina has the kernel of an idea, but she wants to make sure that it will work before building it. She starts untying the balloons to prepare for her test. It seems that Carina believes she will be able to reverse-engineer her device. Carina asks if David has a driver’s license, and he replies that he only has one for an automatic transmission car. Carina abandons the idea of a car and instead ties the balloons to the back of a tricycle. By the time David starts her device, it is clear that several alterations have taken place to her idea since it was last shown: a rope is tied to the back of the tricycle, instead of the balloons; the tricycle is weighed down by a briefcase; and David is wearing a mask, in order to keep him from “riding at full speed” (presumably because his vision is somewhat impaired). The tricycle’s tyres also appear to have been deflated. When David rides far enough away from the balloons, the rope tied to the end of the tricycle pulls the brick over, and releases the balloons. Carina delays the launch by 37 seconds, and earns second place.

(Written by Jenny R and proofread by Karl Craven)