There is one very short section on the traverse between Effogi One and Brigade Hill where there is a bit of a cliff. Otherwise nothing to make even the dizziest person nervous, but ... there are a number of log bridges over streams where you might fall say 3m into the drink that can be a bit unnerving. You can see these on the DVD. The guides and porters help a lot with unsure people on these, and you do actually get used to them after a few days.