“Facing a possible 10-year prison sentence for rioting if she were to surrender to the police, she slowly lowered herself into the sewer system. Using a compass and headlamp to guide her, May crawled through the opening on her stomach, wearing a gas mask to filter the smell. There are more than 150,000 maintenance hole covers across Hong Kong; as she crawled, May realized there were multiple different tunnels she could take. Even with the aid of maps, she wasn’t sure where she might pop up — or if she would get out of the sewers at all.” Buzzfeed’s Rosalind Adams was on the inside as Hong Kong protests expanded in scope and universities became the site of dramatic battles between students and police.