@Betony
You're kidding right, what you said only works for black bears. Grizzly bears would never run away and would maul you if you screamed at it.. and polar bears would kill you no matter what. On any source you find about protecting your self from a Grizzly it literally says: "If you are attacked by a brown/grizzly bear, leave your pack on and PLAY DEAD. Lay flat on your stomach with your hands clasped behind your neck. Spread your legs to make it harder for the bear to turn you over. Remain still until the bear leaves the area" Not scream at it.. granted maybe a whole class of kids may be a bit more than the Grizzly can chew on, but it wouldn't run of.
Not kidding at all. The story I recounted happened at a nature park in Alaska. And yes, the bear ran off after we made a lot of noise (as instructed to by our guide). In my original reply I simply wanted to point out that the bear being spooked wasn't as comically unrealistic as it may have seemed (grizzly bears, especially juveniles, can get spooked by yappity dogs of all things), so there's no need to regurgitate some WikiHow article at me.
@Betony
Fucking hell, try not to convince anyone to do what your class did because I have the feeling like it wouldn't work if there was only one person. Though juveniles are easily scared, their momma's won't hesitate to bite your ass.
@RC1138Boss The filter was busted, so the frog and stag beetle were able to get through it into the hose. Replacing/repairing the filter prevented more stuff getting into it, but they had to clear the hose as well, since more stuff could be in it.
@The_Trash_Man
Whatever came up in Google, tbh.
It's not the only (and not the main) meaning of this kanji actually, as far as i know.
https://jisho.org/search/%E5%A7%A6