I wonder how hard it is to bake a cake like that…

↓ Transcript
1 - (Gary is behind bars and Smash is visiting with a cake)
Smash: Hey Gary!
Gary: Smash! You gotta get me outta here!

2 - (Smash hands Gary the cake while checking to see if the coast is clear)
Smash: Relax! Here, I smuggled in something to help you out.

3 - (Gary tears apart the cake to reveal...)
Gary: A harmonica?!?! Where's the file? Where's the lock-pick?
Smash: Dude, do you know how much trouble I'd be in? Besides, it gets really boring in there...