Balconies are designed to withstand pretty dramatic forces. That said, the type that project out from a shear building face can be a bit unnerving; I don't think I'd spend too much time out there.
I can't quite tell for sure but either the mechanical levels on the shorter tower are lit up tonight or they have a spot light on over there doing work or something(shorter tower is mostly blocked by taller from my point of view) haven't noticed this light before.