The door has slammed shut and locked behind you!
You and your party have entered a dungeon room about 30 feet wide, 60 feet long, and 12 feet tall. The door you entered is on the 30-foot wall, so you're facing the long direction of the room.
In the middle of the room is a chasm or hole that is as wide as the room, preventing you from crossing to the other side. The room's walls and ceiling extend the whole way, so only the floor is open.
The chasm is about 15 feet wide, but you must cross to reach the other side's open door. The only thing on the other side is a three-foot-high square stone post. It is about a foot thick.
You only have the standard adventurers' equipment and level-three skills and magic.
1) Pick your race.
2) Pick your class.
3) Decide how you will cross. Be as creative as you can!
4) If someone posts before you, you can incorporate that into your solution.
5) Assume you rolled a 15 on all d20 skill checks and saving throws.