I could also "program" myself to come out at a particular time.

Ringing a handbell, he brought the old cultivator out of samadhi. A moment passed, then the old cultivator began to stir a bit.

Hearing the footstep, when Nanguo Ziqi went down from the earth bed, Yan Chengzi, who stayed outside the room, knew that his master emerged from meditations, so he stepped into the room at once.