The Dink Network

I've made a script that causes stuffs to detonate on contact, and everything in it's all good apart from the sound. When they're exploding next to a hard object it spams the punch/hit sound effect (as if Dink was repetitively punching a rock, which would hurt). Is there any way to make it use the explosion sound instead like 'item-bom' does? I figured it should be simple, but I can't work it out for some reason

This is the chunk of code that blows it up and things.

sp_hard(&current_sprite, 1);
sp_pseq(&current_sprite, 855);
sp_pframe(&current_sprite, 1);
draw_hard_map();
sp_nohit(&current_sprite, 1);
sp_que(&current_sprite, -500);

int &bang = sp_editor_num(&current_sprite);
if (&bang != 0)
{
editor_type(&bang, 3); 
editor_seq(&bang, 855);
editor_frame(&bang, 1);
}

int &loc_x = sp_x(&current_sprite, -1);
int &loc_y = sp_y(&current_sprite, -1);

&bang = create_sprite(&loc_x, &loc_y, 0, 420, 1);
sp_range(&bang, 30);
sp_brain(&bang, 17);
playsound(6, 22050, 0, 0, 0);
sp_seq(&bang, 161);
sp_strength(&bang, 10);

kill_this_task();