Pass the popcorn: Tribeca fest opting for action pix.(Tribeca Film Festival)

The Tribeca Film Festival is shifting gears.

After announcing a list of arty pics from indie auteurs, the fest--co-founded by Jane Rosenthal and Robert De Niro--is now loading up on high-profile tentpoles.

The move to include "Mission: Impossible III" and "Poseidon" effectively ups the commercial ante for a festival born out of the ashes of 9/11.

But it might also end up putting Tribeca's regular auds through some wrenching emotional gyrations--from viewing real-life tragedy onscreen to watching manufactured disaster and derring-do.

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