Harinam Sankirtan in Cologne, Germany (Album with photos)
Srila Prabhupada: A devotee, either in danger or in happiness, constantly chants the Hare Krishna mantra. When he is in danger he is immediately relieved, and when he is in a position to see Lord Vishnu or His associates directly, by chanting this maha-mantra he can please the Lord. This is the absolute nature of the maha-mantra. Either in danger or in happiness, it can be chanted without limitation. (Srimad-Bhagavatam 4.12.21 Purport)
Find them here: https://goo.gl/drK01N