请问：Speeding off in a stolen car,the thief thinks he has got a great catch,but he is in for anunwelcome surprise.这句中的 but he is in for an unwelcome surprise

请问：Speeding off in a stolen car,the thief thinks he has got a great catch,but he is in for an
unwelcome surprise.
这句中的 but he is in for an unwelcome surprise

但是他已经卷入了一场令他意想不到的事件中.
unwelcome surprise 本意是意想不到的惊喜,在这里有讽刺意味