Dr. Rodney McKay: Why wait? Why does the guy show up a day-and-a-half after this all starts to do his whole "Prepare to meet your doom" thing?
Major Samantha Carter: I don't know. Maybe he wanted to make sure it was gonna work.
Dr. Rodney McKay: Yeah, that would be embarrassing, wouldn't it? "Nothing can stop the destruction that I bring upon you!" Then the gate shuts down. "Oops, sorry. Never mind."