Kristoffer neglects to check one important fact

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

Kristoffer first enters the house through the back door, and locks it behind himself, assuming that Olli will not have the key (an assumption that quickly proves to be incorrect). He then moves the white paper arrows which mark the route Olli will be taking between A and B, hoping that he will blindly follow them in the wrong direction. However, Olli's free will becomes apparent, as he pursues his original intended path, ignoring the arrows. Olli quickly climbs over the barricade that Kristoffer has erected at the foot of the stairs using furniture, and reaches the B on the balcony unhindered after just 1 minute and 14 seconds. Kristoffer places fourth in the task.

(Written by Karl Craven)