It would be one hell of a show. Like a tactical nuke, probably.
Edit: did the math because I was curious. A fully fueled 747 contains approximately 9 trillion joules of energy worth of fuel (not counting any payload, or the energy in its aluminum fuselage - which would be significant). A ton of TNT equivalent is 4.181 gigajoules. So the fuel load of a 747, if properly detonated, would be “equivalent” to a 2KT nuclear bomb.
A 747 has a maximum payload capacity of an additional 100-120 tons.