A simple encounter to to learn the mechanics for the new players and refresh our older players.
Opening the door the players found themselves on a platform. Before them a grand sight of trees with a river cutting through them to the temple they seek. The problem? The platform floats in the air, a waterfall below them.
The dragonborn smashes the platform, sending the party plummeting down.
At this point the first of four Acrobatics checks are called for. The players tumble down, several taking a healing surge in damage, but everyone eventually makes it.
That was it for the first encounter. We reintroduced the dice mechanics and the idea of healing surges. The characters at this point didn't know each other much but it was already obvious the Dragonborn and the Warlock were not going to get along.