Final Image
Step 1
Open the pic and press Ctrl+J for create new layer.
Step 2
Now I will make the blast more sharp. Go to Filter> Noise> Add Noise and use the settings below:
Step 3
Now go to Filter> Blur> Radial Blur
Step 4
Press Ctrl+Alt+L to use Auto Levels. Click Auto> OK
Step 5
Now we need to seperate the blast from the car. First, add a layer mask.
Step 6
Use eraser tool click at layer mask. Then erase at car body.
Final Image