Post Malone is currently on tour right now and some people posted up some videos of his performance and they felt like something was wrong with Post.
After the initial video was posted - more Twitter users started to post their own videos where they felt like his behavior was a bit off!
It's pretty known that Post Malone likes to drink and live a "Rockstar" life but some fans feel like he might be going too hard. It's ok to be concerned because we've lost so many artist to drugs and you never want to let someone get too far down the hole before you try and help them!
But at the same time, his unusual behavior might just be him getting into his performance. If you notice in the video, his vocals are good and he's not mumbling, he was just a bit off balance.