How to create a background explosion

[kaneleussink]

My friend used polish to create a photo of a colourful explosion in the background of him on his bike. 

I got photoshop and wanted to try it, how would I do it? I would use the raw image and this explosion:

[c.pfaffenbichler]

Place the image as a Smart Object and set it to Blend Mode Multiply and adjust the Opacity. 

[kaneleussink]

Ok thank you, I will give it a try

[c.pfaffenbichler]

In the screenshot I put the image in a Group and set the Group to Multiply. 

That way one can add Adjustment Layers (Curves, Hue/Saturation, …) to manipulate the effect of the placed image easily.