Flash fiction: write for a specific time/word count.
Free write: just write and don't look back.
Either way, it's open-road writing. Thinking lately of some lyrics where the words match so closely to one another, they demand active listening:
Walking down from home to unknown.
Working down my own to unformed.
Walk in, drowned for more to unfold.
Waking in down, holding my own.
Fun. Something there.