A year ago today, we were trying holding therapy with our very trying children as well as attempting to deny the fact that Papa was coming down with a nasty flu.
Plop your raging child onto their belly over your lap so that the legs dangle over one side and the arms over the other. Plant your elbows on your kneecaps to hold your kiddo there (this also allows you to put your fingers in your ears if you wish). Let them express all their angry indignant feelings in whatever volume they wish (not that you could stop it anyway). Wait until their angry energies are spent. Your child will relax and you can rock your legs left and right and pet them; I start humming the soothing song about now.