How to Catch?

This would depend on what it is that you want to catch. If you want to catch a ball or some other object thrown towards you, extend your arms and clutch the object with your hands. If you want to catch something in your mouth, you extend your neck out and open your mouth, clamping down with you jaw when it reaches your mouth. If you want to catch the flu, go out in public during flu season and have people cough on you.