For starters, gasoline is not a high explosive. If we were talking 50 pounds of Semtex or the Al Qaeda standby, TATP, I would be impressed. Those are real high explosives with a detonation rate in excess of 20,000 feet per second. Gasoline can explode (just ask former owners of a Ford Pinto) but it is first and foremost an incendiary. If the initial reports are true, the clown driving the Mercedes was a rank amateur when it comes to constructing an Improvised Explosive Device aka IED. Unlike a Hollywood flick the 50 gallons of gas would not have shredded the Mercedes into lethal chunks of flying shrapenal.
The fact that "officers courageously disabled the trigger by hand" coupled with the report of the smoke in the car leads me to believe that the mad London "bomber" tried to construct a Molotov cocktail of sorts and lit a cloth fuze. Fortunately he left the windows in the car up and there was not enough oxygen to really get the fire going. Looks like the brave British police reached in and snuffed the flame.
Judging from the overreaction to this non-incident I think we can safely conclude that Osama Bin Laden will remain holed up in Pakistan and let the fear mongers at CNN, MSNBC, and FOX do the dirty business of scaring the shit out of people.
While they had the potential to some light damage, it is clear that raw anger and desperation, not professional calculation and terrorist training fueled these attempts at terror.
It should also be clear that these attacks are not being driven so much by the ideology of Bin Laden and radical Islam, but anger at the ideology of Tony Blair (and George Bush). Their incredible stupid and fouled up attempts at reducing terror has only grown it, both abroad, and at home.
My only real concern about these type of terrorist (and calling them terrorist is an insult to terrorist {if you can insult a terrorist}) is one day, a group like these idiots in Scotland, or the foolish saps who dreamed of attacking Ft. Dix, or the lost souls who formed their own religion and army in Miami (or the JFK crew), may get 'lucky' and do damage far beyond what they are actually capable of.