So Sue Lochiro could examine him more completely, Chen Mu had compressed his perception into an unimaginably tiny ball. Even though his control was a lot more powerful than before, the extremely compressed perception's sudden fluctuation made him nearly lose control.
That wasn't the first situation where Chen Mu had encountered a loss of perceptual control, so he didn't get flustered. In truth, he hadn't gone through any systematic study about how to control perception. What he could do was partly from his conjecture according to the principles elaborated in the mysterious card, and the rest was from his own explorations.
The perceptual spring coil's composition was something he'd thought up out of thin air. So, he wouldn't be surprised if some strange situation appeared with his perception.