I hate pointless movies. There's one with Gary Sinise, called Impostor, where he is suspected of being an enemy robot--basically a walking bomb. Let's see, should I put the rest in a spoiler thingie? (How does that work? Hmm . . . Ah, easy enough.)
So he goes through the whole movie, trying to establish his humanity. The action and suspense go along the lines of Minority Report. It's tight and compelling. Then we get near the end, and it seems he's about to succeed . . . and then his eyes go blank, and he blows up like a nuke. The End. Roll credits. WTF?!! I just wasted 2 hours of my life. He's accused of being a walking bomb, and he IS a walking bomb. Oh boy! There's a plot twist. :P