3.Saying the words of consecration (“This is my body…”)
Who are you? Because if you’re not a priest concelebrating the Mass, zip it, friend! At best, this is inappropriate and mildly scandalous; at worst, it could constitute simulation of a sacrament — obviously a very grave offense. The ministerial priesthood is absolutely distinct from the baptismal priesthood, and the laity have no business trying to blur the lines.