Ahead of SpaceX’s experimental rocket launch Monday (Aug. 26), police warned nearby residents to leave their homes around launch time because the windows could shatter, according to the Brownsville Herald. SpaceX’s test of the so-called “Starhopper”—a prototype of a reusable shuttle meant for human transit—may well create an “overpressure event” capable of breaking glass in buildings nearby. The police-delivered warnings advise residents to, at a minimum, exit their homes when they hear police sirens around the 4pm launch window.