u/JuggernautFamous1294

So I was playing against a challenger player and he was trying to frame trap me with 5L, so I decided to go cheap and mash lvl3. There is no way I saw the 5L whiffed and suddenly it was a parry for the lvl 3. I went to the lab and it seems to only work if it’s on the start frames of the 5L but sometimes it doesn’t work, does someone know how to do that?