He may have reason to be nervous. "I think it's really a 'buyer beware' issue."

VOA: standard.2010.05.27

It makes me really nervous to speak like Japanese and Spanish because of my pronunciation,

我一说日语和西班牙语就很紧张，因为我的发音。

学习外语的时候 - SpeakingMax英语口语达人

I have a friend who's a social psychologist who told me a story once that really made me very nervous, although she's fine.

我有一个社会心理学家朋友,她曾经给我说过一个故事,让我很紧张，虽然她现在一切都好。

耶鲁公开课 - 心理学导论课程节选

It makes me really nervous.

这让我特别紧张。

I'm worried 实战 - SpeakingMax英语口语达人

they feel nervous, and I think that's really unnecessary.

他们会感到紧张，但我觉得这个实在是没必要。

紧张是学英语的敌人 - SpeakingMax英语口语达人