I get to the merge point , and he goes flying right through his stop sign . I have to slam on my brakes , I lay on the horn ... at least he bothered to realize " Oh , shit , I just fucked up , did n't I ? " And pulled over for a second to make sure he did n't make me go flying off the road or anything . But only for a second , then he starts up again , waves his hand out the window in an attempt to say ' sorry , ' and turns up into the development .

Available options:
(i) For the person to apologize .;
(ii) For the person to revoke their license .;
(iii) For the person to pull over and explain why they did that .;
(iv) For the person to realize they messed up .;
Q: What may be the reason for laying on the horn ?
(iv)