User blog comment:Lord Loss/Monster Hunter Theory... Blog/@comment-4424020-20111005035413/@comment-2.96.208.108-20120104180621

It could be similar to how ball lightning is created, which is one of the mysteries of science, so that probably isn't helpful

Regarding the beam, you can make electricity travel in a straight line but you have to ionize the air first to make it conductive. You do this with a high energy ultraviolet laser. This has been made in real life. The yellow colour is strange though, as I thought electricity glowed purple like plasma globes when it did this.