1. Lava hopping: The most common type of obstacle in any obstacle course. Almost all obby courses have this obstacle. You have to jump over lava to get to the other side.
2. Right Log/stick/fence/line/ladder: This is also a common obstacle in obbys. You have to find the right one and go through it. If you choose the wrong one you die/fall/lose.
3. Avoiding: This is seen in some obbys. You have to avoid what ever is in the way. If you hit them you die/fall/lose.
4. Trampoline Jumping: This is rarely seen in obstacle courses. You have to jump on trampolines to go to the checkpoint.
5. Disappearing stairs: Almost seen in every obby. You have to climb to the top before the stairs vanish.
6. Driving: Seen in a few obbys. You have to drive to the other side over lava/water/acid/road.
7. Maze: Common obstacle.
8. Boulder run: Run from a boulder.
9. Zombie pit: Go over the zombie pit without falling in.
Beginners Guide to Roblox 