I've read some abduction research that says Grey implants are often crystalline and placed behind and below the left ear. That might explain the lumps under the skin of my friend and I, under our ears. We're both abductees. Also, it is interesting that we were in the kitchen one day (month or so ago) and we both suddenly felt a pulse, waves of this painful energy, this squeezing feeling in our faces. Behind the nose, almost behind the eyeball. Felt like if you had a bad bruise and someone kept pushing on it and holding down for 5 seconds at a time, then letting go, and redoing that. Now if it was just me, I'd say "That's weird, must be another random pain that occurs in the human body for no reason 'cept for random biological stuff", but we both got the sudden pulse at the same time, in the same place, so I think we both have implants there which were stimulated at that moment for unknown milab or alien reasons. And also, about a week ago, I noticed the exact same pulsing feeling, that painful squeeze occur where that subdermal bump is below my ear. It's about a millimetre in diameter, and the squeezing pain radiated about a 2cm radius around it. It wasn't blood pulsing. Not sure if this is alien stuff, or human milab stuff going on. But I believe there are also etheric implants that are more of an alien thing going on as well. Check out William Baldwin's Possession book for some great info' on that.