Please choose the correct ending to complete the given sentence: Finance and Business: [header] How to make yourself light headed [title] Crouch. [step] Bend your knees and get low to the ground. Hang your head low.

Ending1: Don't lean forward or tilt your head back. Your head should never be tilted toward the ground. Ending2: When you stand up quickly after you've been crouching, sitting, or laying down for a while, the blood rushes from your head, and your brain is momentarily knocked off of its usual equilibrium. If you haven't been sitting or laying down for long, try crouching down and breathing rapidly to simulate the process. Ending3: This only takes you temporarily until your head is near the ground again. This will ensure you get some air out of your lungs. Ending4: Your head should be hanging comfortably down, which helps to prevent headaches. This helps to replenish energy and electrolyte levels in your body.

Answer format: ending1/ending2/ending3/ending4