What Possessed Me to Do This?

We are working on "de-cluttering" our home to list it for sale in April, need to have my "man cave" painted first.  To prepare for the painters' arrival, am boxing up my audio system, moving the components to a "climate controlled" storage unit.  I got the lighter stuff boxed up without assistance.  My son helped me place my 110# power amp on the carpeted floor, flip it over to bolt it to the plywood for the base of the inner carton, eventually getting it boxed and double-boxed, taped up and ready to go.  One of my son's friends is coming over for dinner, to help box up a pair of 122# speakers and a pair of 133# sub woofers.

What possessed me to get equipment that weighs so much?