Please choose the correct ending to complete the given sentence: Cars & Other Vehicles: [header] How to learn aerobatics [title] Start off flying straight and level with no change of altitude or roll. [title] Push the throttle up to full and pitch slightly down. [step] By doing this you are building up the speed to get you " over the top ".

Ending1: Then gradually push back on the throttle to lift the nose higher until you can go no more [title] Press the throttle down to stop building up. [title] Do be aware of your stopping speed, this is essentially what the instructor wants you to be doing to get you over the edge of the tongue. Ending2: The ride keeps going up, down, up... [title] Look around at different things that you could do, even if it's just to wing and level with someone. Ending3: The use of a bit of manual motion (optimized electric motors) will be shown on the full screen on the aerobatics app [title] Fly straight and level. [step] By using a bit of manual motion (optimized electric motors), you are building up the speed to get you " over the top ". Ending4: [title] At about 120 knots, pull back hard on the stick. [step] G-force will push you into your seat but don't worry about it; just keep pulling back.

Answer format: ending1/ending2/ending3/ending4