Scene: The Graduate Common Room. Lunchtime.
Two LINGUISTS are sitting in the Common Room. The FIRST LINGUIST is producing a series of incomprehensible noises.
A NON-LINGUIST enters, hears the FIRST LINGUIST, and assumes an alarmed expression.
The SECOND LINGUIST attempts to reassure the NON-LINGUIST that the FIRST LINGUIST is not, in fact, suffering from some kind of fit.
SECOND LINGUIST: Don’t worry; it’s Bactrian.
The NON-LINGUIST unaccountably fails to look reassured.