Would you please proofread my Short Story(180 words long)- Thank you!

[Ermaks]

The task was to write a short story which began or ended with :

If I had know what was going to happen, I would never have made that phone call.

Author: Ernesto Luis Barrionuevo Sastre

Title :The Call

The Call

It all started with a joke between some friends of mine on Friday night at my house.At the time, we were discussing about how the FBI worked,when Jack came up with the idea of making a prank call to the FBI.

Although Steve warned us about it,I made the call myself.I picked up the phone, dialed the number and soon it was calling. As soon as somebody picked up, I started threatening them that I was planning to bomber their headquarter.Immediately after they hanged up we bursted out laughing.

At the end of the day, I was preparing to go to bed when I heard some noise outside.It sounded like quick footsteps on the porche.And yet it seemed that nobody was out there.

All of a sudden,I heard the entrance door being banged.Before I could do anything, a dozen of men in black bursted into my room,aimed me with guns, and yelled “FBI.Put your hands up”

I had to explain everything to them .Certainly, If I had know what was going to happen, I would never have made that phone call.

[Gillnetter]

The task was to write a short story which began or ended with :

If I had know what was going to happen, I would never have made that phone call.

Author: Ernesto Luis Barrionuevo Sastre

Title :The Call

The Call

It all started with a joke between some friends of mine on Friday night at my house.(space here)At the time, we were discussing about how the FBI worked,(space here)when Jack came up with the idea of making a prank call to the FBI.

Although Steve warned us about it,(space here)I made the call myself.(space here)I picked up the phone, dialed the number and soon it was calling ringing. As soon as somebody picked up, I started threatening them that I was planning to bomber bomb their headquarters.(space here)Immediately after they hanged hung up we bursted burst out laughing.

At the end of the day, I was preparing to go to bed when I heard some noise outside.(space here) It sounded like quick footsteps on the porche porch. (space here) And yet it seemed that nobody was out there.

All of a sudden,(space here)I heard the entrance door being banged upon.(space here)Before I could do anything, a dozen of men in black bursted burst into my room,(space here) aimed at me with guns, and yelled “FBI.(space here)Put your hands up”

I had to explain everything to them.(space here)Certainly, If I had know what was going to happen, I would never have made that phone call.

The past tense of burst is burst. There has to be a space after a period or comma.

[Ermaks]

Thank you very much.It was very helpful

PD:sorry for the delay

[Abbey55]

I am not a teacher

I think "If I had know" being corrected as corect should have been
'If I had known'?