This little balance is deceptive but with practice can be attained or at least improved upon.
Start standing in Mountain (weight equal between left and right).
Slowly peel right leg off the floor on an exhalation, hold for a few breaths and then on an exhale tuck the chin in and lower head towards the knee. Don’t get too hung up about the two meeting as you are then likely to tense and wobble. Hold for a few breaths and then come back to Mountain.
Repeat on the other side.