It stands for Super Mario Online, I believe. You can select different characters and walk around and chat with others and of course rp.
Anyway...
I was Daisy and I went to the airship area. Then I went to the small area where a few more people were. A Bowser picked me up (anyone playing as Bowser can pick up/grab a princess), put me in one of the "cells", and put me down. I realized I was stuck in this post-grab pose.
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(Cropped the pic a bit to show mainly Daisy and the strange pose.)
I was still stuck in it even when I moved or sat down than got back up. I figured the model woupd go back to normal once I got back to the main hub, so I jumped off the airship. I landed on what I think is a hidden platform.
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It's hard to see due to the darkness, but it's there. And as you can see, I'm still in this pose.
So I jumped off the platform thinking I'd return to the hub, but it killed me. A death/reset in this game takes you back to the character select screen, so I decided to pick Peach to see if it could happen with her. Lo and behold, it did.
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I don't know why the character remains in the pose even after a Bowser lets them go.
I was lucky enough to land on the platform again as Peach.
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Of course, jumping off lead to another death.
But yeah, that's the story of the post-grab pose.
I don't know why I found it so funny, but it made me laugh the first time it happened with Daisy.
Shout out to the two different Bowsers that grabbed me. Y'all are cool. Honestly, I didn't mind being carried by Bowser.
I later tried to do this with Rosalina, but no one grabbed me. I don't think she could be grabbed anyway as she's bigger/taller than Peach and Daisy. Or maybe she can but no Bowser wanted to grab a Rosalina? I'll never know.
Also I tried to reach the strange platform with Rosalina but just ended up back in the hub area. Guess I just got lucky the first two times. Kinda sad that I can't seem to revisit it.