Oh... it's my understanding that a "Tip Stall" and a "Snap Out" are the same thing... one wing stalling before the other. Stalling is defined as exceeding critical AOA for a wing.

You can do this by slowing the airplane down until the AOA increases past its critical limit. You are increasing AOA as you slow to keep generating the same amount of lift. Lift = 1/2 * Coefficient of Lift * Air Density * Wing Area * Velocity squared. The coefficient of lift is dependant on airfoil characteristics and AOA. So, if you slow down, AOA must increase to keep lift the same.

Another way to stall is heavy elevator inputs at high airspeed (below cornering speed... you can look that one up in an aero text... I would need pictures). The elevator increases AOA, increasing Lift beyond required (thus inducing G forces). If you keep applying more and more elevator eventually you will reach a point (critical AOA) where you get enough flow seperation on the wing that it cannot produce any more lift. This is an accelerated stall. If one wing reaches its critical AOA before the other (because it is heavy, is mounted at a different incidence, has a different shape, etc etc) you will "snap out".

As far as I know, elevator stalling is not possible before wing stalling. In the Herc we can actually stall (or rudder lock) the vertical fin with excessive side-slip, and in T-tails you can enter a "deep stall" when your already stalled airplane gets to approx 20-30 degrees AOA and the wing blanks the air from hitting the T-Tail (yes I once flew a T-tail... ug). I've never heard of an elevator stall in an aerobatic bird.