Standing Room
  Access All Areas
  An Interactive Fiction
  Release 1 / Serial number 150512 / Inform 7 build 6M22 (I6/v6.33 lib 6/12N) SD
  
  Standing Room
  You can see an extremely difficult door here.
  
> >   Room of Walking Upside Down
  (Testing.)
  
  >[1] n
  (first opening the extremely difficult door)
  It seems to be locked.
  
  >[2] wear hat
  You put on the Pointy Hat of Liminal Transgression.
  
  >[3] n
  
  Room of Walking Upside Down
  You can see an extremely difficult door here.
  
> >