If you watch carefully, you can see that there is some device underneath the car, if you watch the explosion, it looks like this thing is the bomb.
100% demolition derby
Cheers
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Sitting in the morning sun
I'll be sitting when the evening comes
Watching the ships roll in
And I watch 'em roll away again
Sitting on the dock of the bay
Watching the tide roll away
I'm just sitting on the dock of the bay
Wasting time