LastPick = LinePick(x, WallYPick, z, 0, 0, VelocityZ * 100, Width * 0.9)
WallZ = PickedZ()
If LastPick
    If Abs((Z + VelocityZ) - WallZ) < Width Then
        VelocityZ = 0
        Z = WallZ + Sgn(Z - WallZ) * Width
    Else
        WallZ = Null
    EndIf
Else
    WallZ = Null
EndIf