And in this case, where the earth stops instantly, then the effect on "flinging you forward" is instant, which is instant acceleration, or as close as you're going to get. So, no, 1000 Mph is not enough, right?
It is not enough to completely escape gravity which is why I said it would eventually pull you back down. However, it is enough to fling you 60 kilometers off the planet which is well past the edge of the stratosphere.