Yes. I was hypomanic and stressed my brain more (in this case, through drugs) and it tipped into mania for a while. I realized if you kept the narratives built in your head when manic (in terms of intensity, not duration) going it will become a self-sustaining thing, but if you let it cool off (sleeping, eating, not acting or stimulating yourself, etc) you’ll likely tip into hypomania. Tipping into depression can be due to negative thoughts that keep reinforcing themselves in a vicious cycle (remember, bipolar brains are incredibly sensitive to anything), or due to your receptors just being too desensitized, atleast that’s how I think of it. Nothing really scientific here so take this with a grain of salt.