Finally, an explosion we can't blame on Con Ed (yet):

A blast believed to have been caused by a pipe bomb rocked a Chelsea street early this morning, police sources and witnesses said.

Nobody was injured.

"It was just a very loud boom, like a lightning storm," said John Antolik, who works at a hotel near the scene of the 1:15 a.m. blast on 29th Street between 7th and 8th avenues.

The small explosive device detonated outside a theater studio owned by "Soprano's" star Michael Imperioli, and police said they were not sure if there was a connection between the incident and the actor.

Thought summer was tough? Welcome to fall, New York! Up and at 'em!