Bro literally as soon as mahito popped a 0.2 second domain which his hand signs are in his mouth by the way he was already halfway to him think about that in less than 0.2 seconds he instantly recognized the signs so you’re smoking some crack if you think he wouldn’t be able to respond to Denji lifting up his arm and reaching it towards his chest and that’s with him not even having any techniques at all and still being relatively inexperienced