The thread for flipping shits (and tables)

That's still fucking huge.
Evacuate the room and go sleep somewhere else. Your best bet is a defense in depth. Plan a controlled retreat to let the invader lose control of previously held territory.

Or in practical terms: open your door, gtfo, wait for the damned thing to leave, get back inside and bunker down, name it Somebody Else's Problem.

So I misjudged your situation.
If you can find some thick rubber bands, those are my weapons of choice against arthopod intruders.
Alternatively, try to fence it with the cane. You may be able to stun it to the ground, at which point you can go for a shoe de gras.