One example:
1342 newtons = 134 kg
Think that way you take you car engine (small car engine ~ 120kg weight) out.
Then stick on it fins one to the left and to the right then put at end TEI-TJ300.
Now you will have a "brick with wings " which can Fly (until fuel for TEI-TJ300 finish )
Then you can start TEI-TJ300 engine and it will push you car engine to the sky.
Now imaging that you car engine is flying and approaching a target which is far far away.
Then engine crash/hit the target making a big crater (you can add explosion -> many TNT equivalent ) and many parts of engine is flying around making KA BOOM.
Simple put it is something like that.
Do you like it?