  We calculate the $k$-particle ($k=2,4,6,8$) azimuthal cumulants resulting
from the conservation of transverse momentum. We find that $c_2\{k\}>0$ and
depending on the transverse momenta, $c_2\{k\}$ can reach substantial values
even for a relatively large number of particles. The impact of our results on
the understanding of the onset of collectivity in small systems is emphasized.
