You attempt to make the grate dissapear by placing your coat on it, then pulling it away while saying "Abrakadabra".
Unfortunately, the grate is still there, though it now has a rabbit on it.
Being the compulsive collector that you are, you strap the rabbit to your back and try the next plan.
You nibble on your now rather raggedy looking piece of shrink paper. You can now easily fit through the gate, and you notice a previously extremely tiny but now rather large slanted section against one wall that should allow you to get down the steps safely.
Once safely past the gate, you nibble your biscuit again and grow large once more.
You are now in a deep hallway that extends down, down, far down under ground. You follow the stairs for what seems like hours. You are getting a bit chilly in your bloody skin covering, but it would likely be even chillier without it.
Finally, the stairs end. The room is dark but for a line of dim lights to your left and right which stretch off into the darkness, ending in a large circle of said lights. You imagine it would look something like
, , , , ,
.................... '
you :
.................... ,
' ' ' ' ' ' '
if you saw in text, but your not sure why your imagination is busying itself with such odd thoughts.