The analysis of joints connection or dislocation is now a fundamental basis for the archaeological study of any burial. But the regular chronology of the decay of the joints of a human corpse (least enduring or unstable vs. more enduring or stable) is sometime not observed. The three sites proposed present examples of « dislocation in paradoxical order» : in spite of the lack of balance of some position ancilor some post-mortem manipulation, the keeping of some unstable joints is observed dong with the dislocation of others considered as stable ones. At the northem necropolis of Saï Island (Sudan), those data can be explained by a natural mummification, still observable; at Mehrgarh (Pakistan) the paradoxical dislocations can be observed on heavy manipulated burials (compacted corpse or secondary burial) ; in Manihina (Marquesas Islands, French Polynesia) post-inhumation practices do not affect this non-regular order of joint dislocation and we also know, through the first travellers, that mummification practices had taken place in the Marquesas, in spite of subtropical climate. The similarity of all these archaeological observations leads to propose the hypothesis of a phenomenon of mummification, natural or not, before an eventual resumption of decay processes.