LeedD and others here have it right. The ball is usually tossed a bit forward (into the court) and either directly in front of the body (front = toward the net) or somewhat to the left side (for a righty server). However, as with other topspin serves, the server moves/leans so that they are more-or-less directly under the ball at contact. (Tho' it might still be slightly to the left at contact).
If u have one foot stuck in yesterday & one foot stuck in tomorrow, u are peeing on today.