The Illusion of Death

It's an illusion but so it's supposed to be that like the creature that it's against has to use an action to find that out. Can you do an acrobatics check for that? I rolled 20. Whoa natural twenty. Yeah. Okay not only does it work but you hear this. Flip cup looks up and stops screaming about calm for a second to be like mother. That's my mother. What? Mom. So I want to like sister fight like like flips back to get far away. But anyway as he's flipping back it looks really cool. He's like jumping the air and flipping back and as he's doing so he's like she thing his knife.