That's awesome. If I was going to add 1 thing to that it would be a displacement ripple blowing out from the explosion. I'd say make it take around 1-2 seconds to go from start to exiting the screen to match the slow motion effect.
Make the ripple a ring that we see come out sideways and upwards, then as it exits the sides of the screen do a quick full screen displacement effect fade in and out to represent it hitting the camera along with a slight slow shake. I think that would give it an appearance of force.
Hope that all makes sense
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