Unable to hear back of the head sound effects

The song "The Temple of I & I" on Thievery Corporations' album "The Temple of I & I", at around the 30 sec mark, throws a VERY VIVID image that passes back and forth directly behind my head.  So vivid I feel like I can reach behind me and swat it!

Also, as mentioned, Amused to Death has some 360 deg effects that are cool.

I'm sure this effect is not the result of reflections (for me), but rather of very deliberate mixing, and my brain playing tricks on me.  I surely don't understand everything that is involved in creating this effect, but it's very cool.  

I've had visitors hear it and they say they assumed I had speakers in the back.

My rig: speakers are full Volti/Klipschorns, 300B SE amp, Counterpoint SA-5.1 pre, Innous Zenith Mk3, and Yggdrasil "Singular" DAC.   Good recordings throw a very wide, floor to ceiling soundstage.....but the Thievery Corporation recording is extra fun!

If it's just with headphones, it might be the shape or size of the cups.

I used to think the people who said they heard sounds from behind them on two channel stereo were delusional. I have read that on the Qsound recording Amused to Death by Roger Waters you can hear dogs barking behind you. On my system they are far right and left but even with my ears. Well, just recently on another CD, I heard it. It wasn't directly behind me, but it was to my right and clearly behind my listening position. After the song finished, I started it again to verify it did happen. It did!  I'm a believer!

@andy2 If you want you can try/buy my BAACh. It’s cool but I don’t use it. But yes it sure works. Got USB in yr. DAC? I’m in N Cal. 

I suggest trying a surround sound system.  Once you do you’ll love how immersive a good mix is.  My old man ears have never been happier.  2 channel is still great but Dark Side of the Moon in atmos is amazing.