Please choose the correct ending to complete the given sentence: Health: [header] How to cure brainfreeze [title] Place your tongue against the roof of your mouth. [step] This will warm the area and help to reduce your brain freeze. Keep your tongue there for 5 to 10 seconds until the brain freeze goes away.

Ending1: Repeat this method up to 3 more times. [substeps] Lower your tongue back to the roof of your mouth. Ending2: [substeps] Wait for the brain freeze to clear before moving the tongue, adding more saliva to moisten it. This will also help to open the mouth more. Ending3: [substeps] If you are coughing, stop for about 10 seconds. If you are inhaling or attempting to drink fluids, stop cold turkey immediately. Ending4: [substeps] This will warm up your upper palate and reduce blood rushing to your brain. [title] Press your thumb on the roof of your mouth.

Answer format: ending1/ending2/ending3/ending4