Weird Science Offered As University Class
ludwigvan968 writes "The ACTLab at the University of Texas at Austin is making waves with its Weird Science class. The link is to the TA's blog with documentation of some of the projects: a laser harp, a 3D environment constructed with fog and an LCD projector, and a 'water bridge' using a 50,000-volt transformer. Next semester, they're introducing a new class called 'Disruptive Technologies.'"
Actually that's not quite true - photons can bounce off each other. It's just rare.
On a different note, what you can do is have the beams have enough energy density to be close to breaking down the air. Then where they intersect there will be enough energy to break down the air and create a plasma. This will be a reflective point. It's kinda loud though.