[Forbidden]

Easy:
Lets do the Command, you must only have this to "convert" to a command processor.
First, you have to find out, which Coordinats the player have:

Quote:

new Float: x, Float: y, Float: z, ; GetPlayerPos(playerid, x, y, z);

Now we got the Position.
Lets create the Explosion, with the Position:

Quote:

CreateExplosion(x, y, z, 11, 25.0);

11 stands for the type
25.0stands for the radius

End: If you want to do more Explosion, you can do a Timer, with repeating function.
But, one or maybe two Explosion can kill one Player...