Judging by the state of some buses I think they only get cleaned out annually, so your cane is probably lay there waiting to be found.
Read the next bit with the theme tune of jaws on your mind
! This fish tank noise does it sound like gnashing of teeth ,water splashing ,and frenzied feeding. Also does your neighbour have missing fingers ,has frequent visits to the butchers but claims to be a vegetarian. If the answer is yes Splashy
think
PIRANAH !!!!! Got to leave it there for now the wardens are taking me back to my room.