As Beat made an advanced move, Seven was also focused on killing enemies on his own instead of helping Beat by moving further to go forward, and Beat noticed that he was clearly alone even if he had a member. So he turned his chair around and did not wait for his man to notice him, he needed to know what was going up there. His anger will just be shown at the enemies, still he could not let any danger come to them unseen.
As much as Valor wanted to keep on watching them, he just can't approach any one of his man to check out what was happening outside their hideaway since the upper floor was shaking.
