In a previous study, Carreau et al. [Rheol. Acta 13, 477 (1974)] did not observe a discontinuity in their graphical representation of velocity as a function of volume (0.1-10 cm(3)) for air bubbles using a 0.5 wt% polyacrylamide solution in a 20/80 glycerin/water mixture. In this study, we report that such discontinuity is occurring when smaller volumes are used. Furthermore, we also show that, for concentrations of an ionic surfactant (sodium dodecyl sulfate) above the critical association concentration of the system, polymersurfactant association can lead to possible surface remobilization and to the elimination of such discontinuity.