Quote Originally Posted by nooby View Post
Do you not know what a vacuum is? I hope you're being sarcastic. It is impossible to draw an air bubble out of your muscle, there is no way. When you draw back, it creates a vacuum in the syringe, and while it may look like air, I assure you there is no air in the syringe. SMH.
Honestly, I never thought about it (although I red faced for having not done so). I never even wondered about the mechanics. Thanks for that.