I'll just reply with text, no picture.
Mei
Turn around so you are on all fours, and tackle the front end of the box and try to move around the area by making the box move with you.
You do this for a short time, the box does indeed move around. However it seems pointless as it really does nothing for you, who is still trapped in the imaginary box.
Crack
Take out your pokeball and order Hitmonlee to break the box open.
You pull out your pokeball and cry out, "GO POKEBALL!" Your Psiduck emerges from the pokeball and proceeds to stare at the box... well... that was not productive. You return your Psiduck.
HeadHunter
Using your amazing powers of IMAGINATION expand the box, or just pull out your imaginary FLASK and drink away your sorrows, either one is fine.
You think about expanding the box but the latter option seems far more appealing. You pull out your trusty IMAGINARY FLASK and take a deep swig from it. This is going to be a long night.
Tilly
You're in the Matrix! Use your awesome Matrix moves to get yourself out.
You take another swig from your FLASK and proceed to attempt your awesome matrix moves on the box...
Your head butt wasn't very effective. Then again you are still turned around from making the box move. Perhaps it you attempted to hit the top and not the bottom your lying on.