  We report a kinetic small angle neutron scattering study of the skyrmion
lattice (SL) in MnSi. Induced by an oscillatory tilting of the magnetic field
direction, the elasticity and relaxation of the SL along the magnetic field
direction have been measured with microsecond resolution. For the excitation
frequency of 325 Hz the SL begins to track the tilting motion of the applied
magnetic field under tilting angles exceeding $\alpha_c$ > 0.4{\deg}.
Empirically the associated angular velocity of the tilting connects
quantitatively with the critical charge carrier velocity of approx. 0.1mm/s
under current driven spin transfer torques, for which the SL unpins. In
addition, a pronounced temperature dependence of the skyrmion motion is
attributed to the variation of the skyrmion stiffness. Taken together our study
highlights the power of kinetic small angle neutron scattering as a new
experimental tool to explore, in a rather general manner, the elasticity and
impurity pinning of magnetic textures across a wide parameter space without
parasitic signal interferences due to ohmic heating or Oersted magnetic fields.
