Wouldn't multiple dimensions require some rather strict
cross-dimensional physical placement? The leakage from even a small
black hole popping up on the dining table is apt to spoil ones
appetite. Surely any cross-dimensional gravitational effects should be
detectable?

One wonders whether photons are indeed blocked between dimensions? This
might offer an explanation for the genuine sightings of inexplicable
UFOs and ghosts. Are they "simply" time-shifted images of
other-dimensional realities seen across temporarily weak or
near-coincident dimensional barriers? Perhaps time is really a much
weaker force tham we commonly imagine?

How am I doing? ;-)

*|;ø)#