
What you need:
1. Flashy expensive armour and/or clothing.
2. A really busy server.
3. A friend who is as bored as you and willing to kill some time.
4. To have absolutely nothing better to do.
Now that you and your bud are dressed in your best head for...LUMBRIDGE

Here is a good way to go.

These flags make a good start/finish/lap line.

The first one around 10 times with the least followers wins!
In the very un-likely event that both players end up at the finish with no one dogging their trail, the one who finishes first wins. The same can go for the more-likely event that the two racers finish with the same amount of followers.
It may be good to bring a ref/race judge. But it is hard enough to find two people who are this bored yet alone three.