In a gold cross, you see a needle sticking out of it. The needle is right in the middle of the gold cross. If Jesus were on there, the needle would be sticking him right in the chest.
You're about to give up on the needle when it pops out and flies directly into your shin (しん). Ouch! Now you're desperately trying to pull the needle out of your shin, but it really won't budge this time. Maybe you should have minded your own business.