It was a forecast nobody in the industry was losing sleep over — eight million, maybe nine, for a thriller from a filmmaker whose previous credits lived behind a subscribe button. Then the weekend numbers came in.

Obsession, the Focus Features and Blumhouse co-production directed by YouTube filmmaker Curry Barker, opened to $17.2 million across North American multiplexes, according to figures reported by Deadline on Monday. That is not a rounding error. It is almost precisely double what tracking had penciled in.

Barker spent years building a horror-adjacent audience on YouTube before the Blumhouse pipeline — which has a well-documented habit of finding genre talent in unconventional places — routed him toward a theatrical feature. The Blumhouse model is familiar by now: keep the budget disciplined, keep the concept clean, and let the audience find it. The combination with Focus Features added a distribution layer that typically skews more prestige, which makes the pairing slightly unusual and, this weekend at least, clearly effective.

The result lands at a useful moment for mid-budget horror. The spring slate has been uneven, and a title that overperforms by this margin tends to reset the conversation about what audiences will actually leave the house for. Whether Obsession has legs into the following weekend will determine how long that conversation runs.

As of Sunday, no sequel or follow-up project had been announced. A $17.2 million opening on an $8 million forecast has a way of accelerating those discussions.