Absorb

Tried doing absorb a few times today on a co worker. He said he felt like he became heavy and had to sink down. I didn't feel like i was doing anything. He also groaned a little when i applied a little force in this way. A second Co worker didn't get much out of it, but i don't think i completed the cycle. Anyone have a similar experience? I've never touched hands with any other I Liq Chuan student, so i have no reference outside of these little experiences of mine.