The dialogue is used in a variety of ways. It can be used to express anger, frustration, or disbelief. It can also be used to simply make a funny observation.
1)When someone does something that you find infuriating:
Me: Hum bomb laga denge
2)When you're trying to do something and it's not going your way:
Me: Hum bomb laga denge
3)When you see something that you can't believe is happening:
Me: Hum bomb laga denge