[Sonart]

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Rm, you're completely speculating on things you don't really know. For instance, you have no idea how much arms training a would be suicide bomber receives, do you? My guess would be almost none. After all, why bother? In this case, some minimal pistol training.

Methinks Cl3ver has it right... you shoot the gun at close range to make sure the one, specific, intended target dies, then set off the explosives because, after all, you're in the middle of a giant crowd, where you can either... a) immediately get wrestled to the ground and captured, or... b) take a bunch more with you, albeit less accurately.

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