Mass function of massive (M_dis ≥ 7.5 M_⊙), runaway (faster than ≥30 km s⁻¹) stars depends on the assumptions for the BH kick. Bottom panel: our fiducial simulation with σ_kick = 265 km s⁻¹, including the fallback downscaling of the kick both for NSs and BHs. The fallback is an important effect only for BHs. Central panel: mass function for intermediate BH kicks (σ_kick = 100 km s⁻¹, no fallback downscaling) and our fiducial kick for NSs. Top panel: distribution with our fiducial kick amplitude, but without fallback downscaling (i.e., BH velocity kick). The dashed lines indicate the 90th percentiles of the mass distributions.