"Thank you," he says to Kaeya first, and his tone is grateful, if a little strained. This feels no better than the Reaper's scythe he had taken through his chest the last time he had been this badly injured, but this one is also more annoying simply by virtue of it being something that wouldn't have been a problem a week ago. Eventually, he'll get over it, but not today.

He shifts and adjusts to hold his side with the clawed hand, though it comes with a brief, though sharp hiss of pain. Sebastian looks at Silco's back and simply nods as he starts to move to follow him.

"It is unwise to linger and draw its attention and ire again, since that I do not think I can take twice, at least." A little humor comes to his tone by the end, though it's definitely only partial. It's gone by the time he continues, clearly speaking to Silco now as they start to approach.

"...And my apologies again for throwing you, Mr. Silco. I hope I at least managed to cushion the fall somewhat."

If there were any lingering doubts about where those shadows came from, he at least confirms it easily enough. He also hadn't been able to actually see the catch, considering the timing of meeting the Sanctifier's tail, so there's also some uncertainty that he had put them in the right spot, to be honest.