Grab your camera, and look for any and all transparent objects. Preferably glass objects without smooth shapes. If the object is smaller, such as a glass(for my examples), set it between the camera and a subject(like you, for instance).
Rotate the glass, zoom in and out, improvise until you are satisfied with the result. You are not prohibited from having a little fun in PhotoShop of course. I first use the Dust & Scratches tool to remove the obvious on the picture, and later used the Glass tool just for fun. The results:
Zoom in for greater detail.
Experiment with Color Curves for various effects. Just go crazy!
Curve it the right way and you are on your way to create a B horror movie.
Enough fun for now. I just happen to have this square drinking glass, so it’s good for some fun, but any glass will do. Rotate, snap, add effects, edit the Curves. Enjoy the effects!