“THUD” is an uncontrolled, unsightly, and ungainly foot placement which results in a heavy step and we generally feel the impact of that step which reverberates up through the ankle, then the knees, the legs to the hips, up along the spinal column, and then out through the arms in the embrace which is then transmitted to your partner! Combine this with hanging, pulling, pushing, and the general contortion that goes on for a lot of people and you’ve got issues on top of issues on top of issues.
See Link -> https://tangotopics.com/tango-thud/