During the first battle against ghouls after going upstairs in the Bone Keep, the rogue was attempting to sneak attack a ghoul but was having trouble selecting it as a target. Using space bar to pause the game didn't seem to help, but the battle started with surprised ghouls just after releasing the pause. There were several clicks on the ghoul in both unpaused and paused state.
When the attack succeeded the ghoul was hit for 11 (d8: 5 + d8: 2 +4) damage from the bow and 21 (d6: 3,3,2,5,4,4) damage from the from the sneak attack
Sylvan Elf Shadowcaster Rogue Level 5