i had an air compressor blowing air at peoples faces and for the water one i put a hole in the bottom of the bottle stuck the air compressor in. then i flipped some upside down because it makes them look like they are hanging upside down.
if you take a aerosol can and turn it upside down super cold liquid comes out and when you dump it into water it explodes. then i stitched them together to show the progression of the explosion
i threw the slinky on the table and had a flash go off but i had another light that kept exposing the photo so you get a frozen image and motion