What's your weirdest (though entertaining/thought-provoking) film ever?

By the way, another question in a question..
Someone please tell me the title to that film…awh..can’t recall it quite well, except for a scene or two: I remember this terminator/predator-like guy lurking in an alley and surprising a woman from behind, she screams as she falls, the “thing” pulls out a sort of straw-like object, sticks it in her chest and begins sucking this white substance from her… and to another guy, this creature sticks the straw-like protuberance into his head and sucks out his brains (i suppose… it was a white substance as well.)
I’m not saying this is amongst my favourites, it just came to mind.

Back to the original question, a few I can think of are:
Mindgame,
Dog Star Man,
.. can’t recal any others for now… I’ll post them along the way.