Need Help Clown Triggerfish Owners

[dyno]

Hello, my clown triggerfish recently started banging into the aquarium glass. It’s almost like he’s trying to run from something or thinks there is another trigger in the territory from the aquarium reflection and attacks. He is big and fast, he hits the glass so hard and fast almost sounds like he cracked the glass. He hits the sides so hard during his “episodes” that he knocks himself out like he were unconcios or dead, really. I have never had this problem before in all these years. However, people have posted about this behavior but have not gotten a finite answer as to why?

Thanks

 

[MichaelReefer]

Buy him a foam helmet?

Honestly I'm not too sure.