From the BEA User Gallery, a morph of Chelsea Charms by Heller from years ago when she would do tours and private dances in Europe. 
If only Chelsea could have prepared and appreciated the gift she was given, but the truth is that she wanted 2500cc implants, not to be inundated with breasts so huge that they would change every physical thing in her life. The fact is, when your boobs are really huge, you cannot do anything in the same way you would with normal size boobs; Chelsea experienced this and grew to resent, rather than embrace, it.
I do remember in a private dance I had with Chelsea, that one time I lifted her breasts just to see how heavy they were and to get a feel of such an act and she then got upset at me because she said, "that hurt a lot!" , and like I said I only lift them a little bit, after all, she had just motorboated me and slapped my face with her boobs. I meant no harm, I was just curious but afterwards, in the future, she wouldn't want to be with me and that is when I got on her shit list. 
Was it physical pain that she complained about? Lifted from underneath, I would not suspect any pain for just a couple inches because she did have a fold. Without a fold, like Beshine, lifting would likely incorporate shifting the entire implant higher, as you see them naturally do when she lies on her back; her boobs naturally flow with her rib cage to where the crests now just about touch her chin as she s1eeps.
The motion is something I have wondered about since Beshine released that video explaining that while her breasts do not require external bras for lifting, why and when she wears them. One of the reasons she cited was that they wobble so profusely that bumping and rubbing against each other makes them sore, so she puts on a bra when she anticipates that ( two, a tight shirt, and loose top for walking in public ). I would think Chelsea would really feel the pounding she gave her boobs.