Spend a day in San Francisco pushing the limits with the world's best free-solo climber Alex Honnold.

It’s a weird one, although the climbs are perhaps physically easier, are man made objects less predictable than nature (referencing the glued on brick facade)? Either way, Alex has been talking for some time about climbing the 1,667ft Taipei 101 and this seems to be a prelude – what ever happens we look forward to whatever is next, stay safe Alex!