[header] How to perform a flying side kick [title] Keep your guard up. [step] In order to execute a flying sidekick, you need to learn to protect yourself from your opponent's attacks while you wait for an opportunity to use it. [substeps] Raise both fists to just below eye level to place them in position to both block strikes as well as to execute offensive movements. 
Keep your rear elbow tight to the body without touching it. It will protect your solar plexus and ribs.