If a player examines a skeleton in the Slayer Tower they will get this message, "How do you make a skeleton laugh?" Then if they examine the skeleton next to it, they will be rewarded with the message, "Tickle his funny bone."
Trollheim: "Heim" is the German equivalent of the English word "home". So Trollheim translates to "Troll home" and Trollheim is home to the trolls in RuneScape.
If poison delivers the final blow on a player's Slayer assignment, the kill will not count for his/her task. This was implemented so players could not poison a monster then hide in a safe-spot.