On 12 June, 2021, Andy Ngo received another threatening phone message from an antifa referencing a concrete milkshake to the face. In June 2019, Ngo was punched, kicked and then hurled with “milkshakes” at an antifa riot in downtown Portland. Police tweeted out that they believed some of the shakes may have been tainted with quick-drying cement, a caustic chemical mix.