It's very, very hard to name the single worst thing about this movie, but I think the scene when a wave bigger than the Himalayas carrying the Air Force One airplane crashes into the arks made my brain hurt the most.
What were they thinking ?
Honorable mention goes to SyFy's "Morlocks", a spin on the classic "Time machine" story by Wells, here the morlocks come from the future to eat people and blow **** up, apparently. I started watching this because I like David Hewlett's Dr McCay from the Stargate series (don't hate) so I was hoping he'd bring some character into this... instead I got a headache from screaming "WTF" at the tv. Describing this as science fiction is a slap in the face of science. I usually don't do this, but I actually texted several of my friends to watch it too and tell me I was wrong. I wasn't.