public void onBlockPlacedBy(World par1World, int par2, int par3, int par4, EntityLivingBase par5EntityLiving, ItemStack par6ItemStack){
super.onBlockPlacedBy(par1World, par2, par3, par4, par5EntityLiving, par6ItemStack);
TileEntity te = par1World.getTileEntity(par2, par3, par4);
if(te instanceof TileEntityAirCannon) {
TileEntityAirCannon teAc = (TileEntityAirCannon)te;
teAc.onNeighbourBlockChange(par2, par3, par4, this);
}
}
}