Inês eats some watermelon
Here's a description of the contestant's attempt. Someone's probably working on collecting some images to illustrate it.
Inês enters the lab empty-handed and, upon realising she will run out of time just getting a knife, takes the cutting board on which the watermelon is resting and slams it on the watermelon, trying to break it open. She finally throws the watermelon on the ground and starts eating. Inês eats a total of 482g, and comes second.
(Written by Jenny R and proofread by Karl Craven)