[Dyerryjex]

The obvious answer would be don't use the 'wiggle out technique', but I'd say that it's possible that your heart skip is your heart chakra activating. Perhaps the wiggle is activating a heart chakra exit for you. The only way to decide whether your heart is actually skipping is to be monitored when it happens, and that takes some dedication and trust towards someone to check as it's happening to you.
Meanwhile try exit methods that use another part of your energy body (or establish the intention) and see what happens. Alternatively, if you have a good stethoscope you may also lie down and watch for a skip and see if you're having them regardless of practice -sometimes awareness practice makes you aware of what's already been happening-and then you notice it. If you find you're having real heart skips you may want to get checked out for cardiac arrhythmias.
But chances are it's the heart chakra- that is common in projection, and my first conscious projections were heart chakra related ones.