Black hole jet ejections are powerful outbursts of high-energy photons and particles that provide insights into extreme astrophysical processes. However, predicting when they will occur remains difficult. In a study, researchers from Japan analyzed observations of four black hole binary systems, identifying decreases in the accretion disk's inner radius and changes in emitted X-ray variability as possible predictors for jet ejection. Their findings could help astronomers forecast these phenomena more accurately and coordinate timely observations.