LOS ANGELES (Reuters) - Reality hit home in Hollywood on Wednesday as studios delayed release of two major films featuring bombs or terrorists -- including Arnold Schwarzenegger's "Collateral Damage" -- and yanked ads for "Spider-Man" a day after the deadliest attacks in U.S. history.

Executives at the nation's major television networks, too, reconsidered their fall TV schedules with one, NBC, deciding to postpone fall premieres altogether by at least a week to make way for ongoing news coverage of the attacks on the World Trade Center and the Pentagon, which may have left thousands dead.

Walt Disney Co.'s Touchstone Pictures postponed the September 21 premiere of comedy film "Big Trouble," starring Tim Allen, and AOL Time Warner Inc.'s Warner Bros. delayed its October 5 release of "Collateral Damage," in which Schwarzenegger goes after terrorists.

Neither studio set new debut dates for the movies.

Based on a novel by Miami-based humorist Dave Barry, "Big Trouble" follows a group of people who find a mysterious suitcase leading to a terrorist plot revolving around a black-market nuclear bomb, shady businessmen, FBI agents and hit men.

A two-sentence statement from Touchstone cited the "national tragedy that occurred" as the reason for the delay.

In "Collateral Damage," Schwarzenegger portrays a fireman who sees his wife and son die in the terrorist bombing of a building. But when he travels to South America to avenge the deaths, he finds himself caught up in political intrigue.

Similarly, Warner Bros. issued a statement citing "yesterday's tragic events" as a reason for its action.

Sony Pictures Entertainment, a division of Japan's Sony Corp., pulled from theaters trailers for next May's "Spider-Man" in which bank robbers are caught in a web spun between the World Trade Center towers. Sony also recalled posters in which the towers are shown in a reflection of the comic book hero's eyes.