They don't even speak that elegant Hammer Films English they talk like a garbled transmission played backward: ' Qwe!nt raqulo*gg brop#sith!' The movie, which speaks their language, helpfully provides subtitles. Count Dracula at least had style and a sense of personal destiny these guys are merely obsessed with their next meal.
They move with loud whooshes at lightning speed when you can't quite see them, and with ungainly lurches when you can. Their method of attack is the standard one in creature features.
