Got Perfect Timing and Terrifying Bonus Icons with a single shot
This needs to be done with a bomb shot to earn the Perfect Timing icon. To earn a terrifying bonus, you need to make your shot pass close by (without hitting) a goblin. Both icons need to be earned in the same shot.
Method: To get the terrifying bonus you need to scare one of the goblins by almost hitting them or knocking off the balloon.
The perfect timing comes from the bomb shot where you make it explode knocking down the building and when you make it explode without touching it. To make it set off you need to put your arms up like a "Y". I made a video below showing how I did it as well.
DEG23Credits: vgmmdi for the Method and Video provided.