沉浸过头，看《疯狂动物城》4D版被喷一脸臭水，这股下水道味到底是不是特效？

Core Viewpoint - The recent experience of viewers at a 4D cinema screening of "Zootopia 2" revealed a significant issue with the water mist effect, which emitted a foul odor instead of a refreshing scent, raising concerns about hygiene and safety in cinema environments [2][4][6] Group 1: Cinema Experience - Viewers reported that the water mist effect during the movie was unpleasant, described as smelling like a "fermented dirty towel" [2] - A journalist's firsthand experience confirmed the presence of a nauseating moldy smell when the mist was sprayed [4] Group 2: Hygiene Concerns - The cinema claimed that their equipment is regularly cleaned and that the water source is changed daily, but they could not provide maintenance records when requested [6] - The unpleasant odor was identified as being caused by the bacterium Moraxella osloensis, which thrives in damp environments and produces a compound that contributes to the foul smell [9][11] Group 3: Microbial Growth in Equipment - The design of 4D cinema seat systems creates an ideal environment for bacterial growth, as water remains stagnant in narrow plastic tubes for extended periods [13] - The lack of chlorine in stagnant water allows for the rapid growth of biofilms, which can release foul-smelling compounds into the mist [13][15] Group 4: Health Risks - The use of untreated tap water in cinemas can lead to the formation of biofilms and further exacerbate odor issues, posing potential health risks [15] - The aerosolized mist from contaminated water can lead to respiratory infections, similar to incidents where aerosolized bacteria caused pneumonia outbreaks [18][20]