Step 1: Install remote control software on two computers
We've used a demo version of TeamViewer.
Step 2: Connect to each other's computer
You'll have to create a remote control session on both computers (computer A and computer B) and then connect computer A to computer B and vise versa.
Step 3: ???
This is when strange things start happening (see the picture below). You should be worried by now.
Step 4: Run for your life!
A massive black hole has just been created.