from the "not again" dept.

Fresh off the wires:

VANCOUVER -- Passengers riding Vancouver's rapid transit system tonight may get a bit if a fright when they hear a big ``boom'' that sounds like an explosion.

But SkyTrain officials say not to worry -- it's just the film crew from the hit T-V show, Smallville using special effects that sound like explosions.

The series, which follows Superman as a youngster, will be shooting in Burnaby between 10 p-m and midnight.

Officials say the boom will likely be heard between the Edmonds and Royal Oak stations.

SkyTrain says the filming poses no risk to travellers, but given the recent terrorist attacks in London, the company felt it was prudent to warn its customers.