HERE WE GO AGAIN. More explosions on the Tube. Tube Geek at Going Underground offers continuing coverage.

On Tuesday I was happily posting about Harry Potter sightings on the tube and now it's bombs again.

Also this hypothesis.

'Explosions' appear to be dummy detonators. No casualties reported. It's NOT a major incident, but windows WERE blown out on the No. 26 bus.

I'm guessing it's someone proving that detonators (with no explosives) still get past the sniffer dogs, and they're doing it to show that panic and disruption can still be caused.

Sounds like one of two from Mitch at Shot in the Dark.

The terrorists are down to using their "B" team. They built a batch of squib bombs; all bang, no bite. Luck is good.

The terrorists tossed off a squib attack to lull the west into complacency.

Something else to consider: some of the followup coverage of the larger attack two weeks ago suggested the bombers were not supposed to be on a martyrdom operation. Remember that bin Laden tape from November of 2001 where he and some buddies were chuckling over the muscle guys on the airplanes who were not aware the hijacking was not going to end with negotiations on a tarmac someplace? Incentives matter. Are the bin Ladenistas beginning to encounter the same problem the Japanese Navy began to encounter at Midway, with the best commanders choosing to share the fate of the ship, but without press-gangs to replenish the ranks?

In related developments, this observation from two weeks ago

Hmmm, did the assembly of U.S., Canadian, Commonwealth, Free French and Free Polish troops and materiel along the Channel coast provoke the buzz-bombs and flying gas mains?

has become this Henry Payne cartoon.