Drunken Dwarf
Sometimes a Drunk Dwarf will go up to you, and talk to you. Talk to him, and he will share with you his meal of beer and kebabs. Otherwise, he will attack you until you talk to him, or run away.
Sandwich Lady
Sometimes a sandwich lady carrying a plate of food will appear around you. Talk to her, and she will tell you that you can take something from the plate, but only what she says you can take. There will be bits of food floating around the plate. Click on the food that you think is the right one, and you will get to keep it. However, if you choose the wrong one, then you will be sent back to Lumbridge.
Freaky Forester
This strange man may teleport you to a clearing in some distant forest to help him kill the pheasant of his choice. If you bring him the carcass of the correct pheasant, he may reward you with some of his uniquely rustic clothes.
Quiz Master
The host of the greatest quiz show in RuneScape, Odd One Out, may invite you to compete for its valuable prizes. You'll need to choose which of the items you're shown is the odd one out, and if you get enough questions right you'll be released with a reward. But should you choose the cash prize or the mystery box???
Security Guards
Security Guards wander the land of RuneScape, looking for players whose recovery questions haven't been set. Have a quick chat and they'll be on their way.
Pirate's Combination Lock
If you're lucky, a wandering pirate will discover buried treasure in a patch where you're growing crops! Help him get the lid off the chest, and he'll share the booty.
Strange Plant
Strange Plants occasionally spring up and quickly grow into carnivorous flora which will attack and poison you if you do not pick their ripe fruit.
The strange fruit picked from the plant will restore run energy and counteract the effects of poison when eaten.
Guardians
Rock Golem
While mining, a Rock Golem may appear and attack you. It's level varies depending on your own. Either kill it or run away. But either way, they are relatively slow, and very unintelligent.
River Troll
While fishing, you may come upon a River Troll. It wants your fish! It's level varies depending on your own. Either kill it, or run away.
Tree Spirit
Tree Spirits don't like their homes being cut down, so while you're woodcutting, you may come upon one of these. It's level varies on your own. Either kill it, or run away. Also, the Tree Spirit does not like to wander away from it's home, so it won't chase you for far.
Shades
Shades are vengeful spirits, and will guard burial sites jealously. It's level varies depending on your own. Either kill it, or run away.
Zombies
While you're burying bones, you may come upon one of these. It's level varies depending on your own. Either kill it, or run away.
Watchman
These guys are employed by the local authorities, to crack down on crime. They don't care much for thieves. It's level varies depending on your own. Either kill it, or run away
Evil Chicken
These pure evil chickens come at completely random times! It's level varies depending on your own. Either kill it, or run away.
Danger Events
Ent
Some trees like to fight back, if a tree turns out to be an Ent then leave it well alone or your axe may get broken. Fortunately Bob can repair axes in Lumbridge, for a price, of course.
Exploding Rock
Sometimes there are dangerous gases in mining sites. Watch out that a spark from your pickaxe doesn't ignite it or it'll get damaged. Fortunately Nurmof can repair pickaxes in the Dwarven Mines, for a small fee.
Swarm
Swarms of insects can be dangerous and hard to disperse; it's best to run away until they leave you alone.
Whirlpools
Whirlpools can suck your fishing equipment straight out of your hands.
Poison Gas
Some chests are filled with Poisonous Gas to deter would-be thieves; just get clear of the area until it dissipates so you don't fall victim to it.
Inconveniences
Loose Axe Head
Sometimes while woodcutting, your axe head will fall off. Just reattach it.
Loose Pickaxe Head
Sometimes while mining, your pickaxe head will fall off. Just reattach it.
Loose Farming Tools
Poorly manufactured rakes and spades will sometimes fall apart. Stick them back together, and you'll be able to continue using them.
Big Fish
There are some big fish around which don't like being caught. They might steal your equipment and spit it out nearby.
Lost & Found Office
-paul