Few example RCs for which either dynamical masses are unexpected or are a DM fraction. The color codes are as follows: Observed RC is shown by brown squares with the error bars connected with a black line; the orange and blue curves indicate the stellar and baryonic mass velocity curves derived assuming Freeman (1970) disk for given total M_* and M_bar. The vertical red, light blue, and dashed blue lines represent the R_e, R_opt, and R_out respectively. From left to right: first and second type of RCs seem to have either overestimated baryonic mass or wrong RC, which leads to smaller dynamical masses than baronic masses, and thus a negative DM fraction. The third type of RCs are announced declining, thus giving us f_DM(<R_opt) > f_DM(<R_out), which is generally not seen in the local SFGs. The fourth type of RCs are disturbed, thus discarded from the analysis.