Hahaha, nice explanation.
But serious, of cause this is a fake, a very good one. The exploding tail section was taken from a picture of an old ex-Air France 747-128 (F-BPVE), that was blown up at Bruntingthorpe, England in 1997. The test was done to see how well different kinds of cargo containers can resist a bomb-explosion and stop it from ripping the fuselage. The container on the left rear side you can see exploding was of the standard unarmoured type, so you can see the amount of damage that brought down the Pan Am-Jumbo over Lockerbie in 1988.
Btw, the Air Canada 747 with the fleet number 307 actually is one of the 747-200 Combi-trio retired in 1999 thats currently for sale.
Everything clear now?