There's one thing we know from 2016, Justin Bieber doesn't like to be yelled at on stage -- and it also seems like he doesn't like to be yelled at while hiking! And we can't blame him!

Wearing a zipped-up hoodie, shorts, leggings and a red bandana, the 22-year-old got his sweat on during a hike in Los Angeles on Wednesday.

Our loudmouth photographer couldn't keep his cool when he spotted JB on the trail this morning -- and really forgot to keep his voice down when talking to the pop star as he was trying to get into his groove up the hill. Hey, we're hikin' here!

When our camera guy asked (and rather loudly) whether or not he thought Kanye West was going to play the inauguration and whether or not the "Sorry" singer would be willing to perform -- the Biebs called him out.

The singer said, "Can you try not to antagonize me? You are screaming and stuff." Our guy then apologized.

The Canadian superstar then addresses the pap's too-loud commentary: "I get what you are saying but we're on a hike -- but it's not like you need to get my attention."

That's very true. No need to yell, buddy -- there isn't anyone else there ...

We have to say -- we're shocked to see JB handle himself in such a restrained manner and really shut our guy up. After his worldwide meltdowns during his concerts, scolding screaming fans, we gotta say we like it when Justin keeps his cool and tells our annoying shutterbug to shut his mouth -- or at least lower her voice!

BTW: In case you were wondering what the "Boyfriend" crooner thinks about Yeezy and the Donald meeting up? He said he has no opinion on it.