I spit into a glass repeatedly, wanting to fill it. When that's not enough, I gag myself with my fingers to hack up more saliva. It works and soon my glass is pretty full. I play with the mass of saliva by taking it all into my mouth and spitting it back into the glass. it gets a bit messy and I spill on myself. You can see ropes of spit connecting my mouth to the glass. In the end, I swallow everything.