Chuck Kuske wrote:
-locate and walk on a crowded street
-make eye contact with someone directly in front of you (best if you're on a collision course)
-aim your center at their center
When done with sincere and focused intent, I think your unwary training partner 'feels' your 'energy.'
Eye contact and physical posturing among primates with a highly evolved social structure.
I'd offer the alternative theory that there's some (surprisingly primative) non-verbal communication taking place here. Congratulations, Chuck, your extended ki makes you an alpha male - you're the biggest chimp in Times Square!