They think it is strange that you don't run with them into the same excess of riot, blaspheming:

 (iii) The third explanation is most probably the right one. Peter has just been talking about baptism. Now the great New Testament picture of baptism is in Romans 6:1-23. In that chapter Paul says that the experience of baptism is like being buried with Christ in death and raised with him to newness of life. We think that this is what Peter is thinking of here. He has spoken of baptism; and now he says, "He who in baptism has shared the sufferings and the death of Christ, is risen to such newness of life with him that sin has no more dominion over him" ( Romans 6:14). Again we must remember that this is the baptism of the man who is voluntarily coming over from paganism into Christianity. In that act of baptism he is identified with Christ; he shares his sufferings and even his death; and he shares his risen life and power, and is, therefore, victor over sin. 