Manocheese and truevox over on Reddit ask how you get in. Maybe I could make a video with the dummy but a few pictures should be enough. You rotate the sphere to this position, put your foot in the corner of the chair and enter while crouching.

Enter

crouch

The motors will be ‘locked’ at this position so there should be very little movement. The first few tries it would be a good idea to have someone hold the sphere steady. The castor wheels can also be locked for extra stability by a friend.

rotate

Now the sphere pitches slowly forward when you’re ready and you shift your weight until you’re crouching on the seat with the seat in a normal upright position. You can now sit down and put on the harness so you don’t fall out of the chair.

sit