Physically forcing a mind blank. Is this safe?

Hi everyone,

​I need help understanding something I can do on command during meditation. It requires intense concentration.

​After about 15 minutes of normal meditation, I will focus on making my mind a completely blank screen. To do this, I push on a specific point inside my mind. It feels like a real, physical pressure inside my head and body. When I go deep into this pressure, my anus/pelvic floor automatically clenches tightly

​The moment that happens, there is a literal snap point.

​For the first few seconds, I feel an incredibly deep calm and a totally blank mind. It feels like I am separating from my physical body. But after about 5 to 10 seconds, my brain realizes what is happening and I get hit with a sudden wave of anxiety, like a fear that I might get stuck in it. The moment I get anxious, the state breaks and my eyes instantly snap open.

​This whole process lasts 10 seconds at most.

​I am completely in control of this, Has anyone else experienced this? Is it something to do with kundalini? Im asking as I want to know if its safe or not, I dont want to awaken my kundalini on pressure.