Indeed what the above posters said, it will probably slow down into the close. Just because you are freaked out by all the news and shit, doesn't mean the others are. I think markets will gap up over the weekend (in Europe) and then immediately reverse course. Cash equity trade might thus gap down in the US on monday (with plenty of time to get in futures shorts).
It's what happened last time the market tried above the level it is at now, these things have a habit of repeating themselves. Although last time there was a pile of buyers ready only ~2% lower (2 feb).
Also at the last green print of the latest bear plunge (2/21 when all you americans were asleep at the wheel) it didn't gap down over the weekend even though Libya was already clearly in play at that point and proceeded into the (light) green for the first hour of trading before plunging more than 2% on the remainder of the day.
Talking about the French CAC40 index here btw.
Just assume that the market will inflict the maximum amount of pain on the most people possible and assume you are part of "most people".