"No," Remus began, hoping to try again to break through to Sirius, but he didn't get a chance to continue.
Bellatrix's silent curse hit Remus first and his back immediately arched as much as the bonds would allow but it wasn't until Sirius' curse joined with Bellatrix's, intensifying the pain far beyond what Remus could withstand that he began to scream. The sounds of agony were ripped from him against his will and he was struggling against the ropes that were beginning to leave welts on his skin.