Well, here's the real story. I thought about it for awhile and was like, "daaaa an oxygen lance could do that". So I did a search and this is what I came up with.
http://www.google.com/search?hl=en&rlz=1T4GGIK_enUS284US284&q=oxygen+lance+pictures. Well, well, that looks like the dam picture in this geeks video and you get a close up of the picture. You can see the slag on the inside, up on top and the sides, then they stuck the lance through for the cut from the inside out. Here's a link to his comments on the video if you feel the need to bash like I did.
http://www.youtube.com/comment_servlet?all_comments&v=ccv2W7jZHIM You must be able to log in to youtube for bashing though. I can't believe all the dumb people that eat this stuff up. It's nutts. I wonder if I will get ten grand now. LMAO