Quarantined Lab                                        -      N      - 
(-------------------------------------------------)     - <---(M)---> E
                                                        -      S      -

One of the scientists lies on the ground, mortally wounded.  Before she
dies, she explains to you that you must destroy the monster before it gets
out into the castle.  Before you can ask her any questions, she doubles over
in pain and dies.  Perhaps there is some indication somewhere in here of
what they were trying to do.  
A long suffering, rather abused looking lab rat is attacking anything that moves.
A long suffering, rather abused looking lab rat is attacking anything that moves.
A lab rat begins attacking you!
A lab rat is in perfect health.