  In a recent article, one of the authors used $c=0$ logarithmic conformal
field theory to predict crossing-probability formulas for percolation clusters
inside a hexagon with free boundary conditions. In this article, we verify
these predictions with high-precision computer simulations. Our simulations
generate percolation-cluster perimeters with hull walks on a triangular lattice
inside a hexagon. Each sample comprises two hull walks, and the order in which
these walks strike the bottom and upper left/right sides of the hexagon
determines the crossing configuration of the percolation sample. We compare our
numerical results with the predicted crossing probabilities, finding excellent
agreement.
