Thunder

Sonic Boom!

Thunder a loud rumbling or crashing noise heard after a lightning flash due to the expansion of rapidly heated air.

OR is it . . .

Magnetic Reconnection?

Job 37:5 God thunders with His voice wondrously, doing great things which we cannot comprehend.

Testing Galileo's hypothesis on Falling Bodies like never before – dropping spheres from the Edge of Space (EOS) – To Learn How a Gravity Field is Produced !!!!!!