Thank you all for the comments you provided. I know there are is a lot room for improvements which can be done, and with the practice now and your feedback I think I can do better action short next time
For your questions:
- Our main characters have bad aiming, indeed

. I was worried for the moment on the stairs, because then they are too close one to each other. We had it on our storyboard, but we didn't make it cool because of the lenses we had - we couldn't achieve to "lie" the perspective, so in the post I created the to shoot only 1-2 times. I was able to cut the entire scene, but I prefer to leave it as it is, in order to achieve experience in the editing as well.
- The guns are Airsoft indeed. We have a friend who is really a fan of it, so we borrow them.
- For the whirling background - we used GoPro Hero2, which the actor held on his chest (if you look closely you will see that his right arm is completely still

) The other is color correction.
- The blood splattering is created in Adobe After Effects. It is basically a blood splatter pictures put on top created to appear on a certain moment.
Now with the experience gained I think the next fight action sequence will be better. We haven't done rehearsals for this fight scene, we created it in the moment improvising (with thinking for the post after that of course).
Thanks again for your feedback, it is very useful for me
