How to Leave Aperture Science in Portal and Get the Cake

This video shows how to leave the aperture science building with no hacking required, and for those confused, developers console is built into the game so it has nothing to do with hacking.
A list of console cheats are as follows:

First type sv_cheats 1 to turn on cheats.
God - Invincibility
impulse 101 - get all Half Life 2 weapons
fire_energy_ball - Fires an energy ball out of your face
ent_create_portal_weight_box - Creates a weighted storage cube
fire_rocket_projectile - Fires a rocket out of your face
noclip - Can go through walls and fly around
thirdperson - Changes view to third person
firstperson - changes view to first person
sv_portal_placement_never_fail - Portal can be fired anywhere
ent_fire !picker skin 1 - Turns nearby cube into companion cube