come back down to earth idiom (also bring someone back down to earth)
（使）从幻想中清醒过来；（使）回到现实中来；（使）开始脚踏实地处理问题
to start dealing with life and problems again after you have had a very exciting time, or to make someone do this
The realization of how little work I'd done for the exams brought me abruptly back down to earth. 意识到要考试了，可我还没怎么复习呢，我一下子被拉回到了现实中来。