That's the International Jewish Communist Conspiracy in action, people! One of their spy...

Robertson:

Now y'all might think we're just a group of sad, sorry, sumbitches out here in a field jerkin' each other off... Or you might just think... that we know somethin'. [Group of soldiers nod in agreement] Robertson:
I'm gonna tell you somethin' else. The federal government has a computer. Now this computer is wired to a computer in Jerusalem [rolls eyes] Robertson:
and Moscow! Another Soldier:
[interrupting]
There's something in the river, Mr. Robertson. Robertson:
Where? Another Soldier:
I saw something. Underneath the water, sir. Robertson:
Son... it's okay to be nervous, okay? Uh... there's enough explosives in that boat to blow up every post office in this country, you know? But no one knows we're here, no one knows our plans. Mighty Mack:
[the Bluesmobile comes up out of the water, bringing with it their boat, which rests on top of the car]
Hey, yous guys havin' a picnic? Robertson:
[the soldiers cock their weapons and point them at the Bluesmobile]
Don't shoot, you might hit the boat! Elwood Blues:
[Looking around]
What boat? Robertson:
That's the International Jewish Communist Conspiracy in action, people! One of their spy satellite's must have picked up our location... KILL THEM! [the soldiers open fire on the Bluesmobile with the boat on top of it, but as the car drives away, it hits a divot which causes the boat to be thrown up into the air... It regretably lands on Robertson]