CapnBlogs
You do not need to upset the (apple) carts/tarts just to follow an RA! Each 1° pitch up or down will result in around 700ft/min change in vertical speed. Be gentle.
It does seem to be a little on the overreaction side to do a negative G bunt when you are aware of the other aircraft and you are only asked for 1600fpm descent. Lucky that there were no injuries for the rear crew and SLF.