How would you explain the unusual nature of Josef K.'s arrest to someone unfamiliar with the concept of "arrest," using only the details provided in this excerpt?

From the book

ence of a man sitting by the open window with a book from which he now looked up. "You should have stayed in your room! Didn't Franz tell you?" "And what is it you want, then?" said K., looking back and forth between this new acquaintance and the one named Franz, who had remained in the doorway. Through the open window he noticed the old woman again, who had come close to the window opposite so that she could continue to see everything. She was showing an inquisitiveness that really made it seem like she was going senile. "I want to see Mrs. Grubach ...," said K., making a movement as…

he stood in the middle of the room with his papers in his hand and still looking at the door which did not open again. He stayed like that until he was startled out of it by the shout of the policeman who sat at the little table at the open window and, as K. now saw, was eating his breakfast. "Why didn't she come in?" he asked. "She's not allowed to," said the big policeman. "You're under arrest, aren't you?" "But how can I be under arrest? And how come it's like this?" "Now you're starting again," said the policeman, dipping a piece of buttered bread in the honeypot. "We don't answer…

t, nothing more than that. That's what I had to tell you, that's what I've done and now I've seen how you've taken it. That's enough for one day and we can take our leave of each other, for the time being at least. I expect you'll want to go in to the bank now, won't you?" "In to the bank?" asked K., "I thought I was under arrest." K. said this with a certain amount of defiance as, although his handshake had not been accepted, he was feeling more independent of all these people, especially since the supervisor had stood up. He was playing with them. If they left, he had decided he…

ough, sticking out towards him, but when K. looked up and saw his dry, bony face it did not seem to fit with the body. His strong nose twisted to one side as if ignoring K. and sharing an understanding with the other policeman. What sort of people were these? What were they talking about? What office did they belong to? K. was living in a free country, after all, everywhere was at peace, all laws were decent and were upheld, who was it who dared accost him in his own home. He was always inclined to take life as lightly as he could, to cross bridges when he came to them, pay no heed…

it is they're going to arrest, and why he should be arrested, before they issue the warrant. There's no mistake there. Our authorities as far as I know, and I only know the lowest grades, don't go out looking for guilt among the public; it's the guilt that draws them out, like it says in the law, and they have to send us police officers out. That's the law. Where d'you think there'd be any mistake there?" "I don't know this law," said K. "So much the worse for you, then," said the policeman. "It's probably exists only in your heads," said K., he wanted, in some way, to insinuate his…