TOPIC: What do you think?

Hey guys, I started to work with special effects on video clips. I got asked if I could make some special effects on a small movie, and I was stupid enough to say yes, even tho I got no experience with video effects what so ever.

So I would like to hear what you guys think of this small explosion I made. it's only 4 seconds. And place rate it from 1-10 and tell me why so i can improve



#NOTE
I do know the people in the video don't react to the explosion, it was a random clip I found on google.

its really decent for the first trys, but one thing that really fucks it up is the glas.