Large water clusters are scattered from graphite in an angular and kinetic energy reserved collision experiment. Two types of collision processes dominate the cluster-surface interactions: direct inelastic scattering of clusters and desorption of trapped clusters mediated by rapid surface-induced heating. The previously observed formation of charged clusters is concluded to mainly be associated with the trapping-desorption channel. Classical molecular dynamics simulations of the collisions agree well with the trapping-desorption channel, while the direct scattering process is less well-described.