Horn honking is not permitted as it might scare horses.

禁止鸣按喇叭，因为这可能吓到马。

youdao

The horses were big enough to scare Marie (not her real name) and her eight-year-old daughter, she says.

这些马匹非常高大，让玛丽(假名)和她的八岁女儿吓了一跳，她表示。

youdao

It hasn't exactly been at the top of the SNP's manifesto priority list - top slot there was economic recovery and job creation - and Labour say the Nationalists have played such a move down, so as not to scare the horses.

BBC: Scottish Election: Campaign successes and stinkers

In the Cajun match races, McNamara said owners who didn't use jockeys would hedge their bets by tying beer cans filled with rocks to the horses' manes to scare them into running harder or, in some cases, fastening on a live chicken.

WSJ: Kentucky Derby: Do Horse Races Really Need Jockeys?