Just need to call that period of time a catchy name. I call it "not allowed to make life decisions hours"

I don't know why you'd think that
bsky.app/profile/nytd...

You could use a leaf blower to throw sand or gravel instead of just air, at least in small spurts.
Most things that could throw mud in a stream tend to clog, unless you really water it down, then you can probably use a hose.

It depends on how strict you want to be.
If it has to throw rocks, it's a sling.
If it has to throw things that are considered "earth element", it's a gun.