Termite grenades can kill HULKS?!

I’ve been trying the termite grenade since it looks cool and I had ran out of autocannon ammo while trying to take out 2 hulks so I throw my last termite grenades. I threw 2 grenades each hulks and they both died surprisingly! I’m not sure if anyone knew this but I didn’t see this being told enough about the termite grenade being able to do this.