And they have this “rah-rah-rah-rah-rah-rah” – this really weird vibrational noise that’s just not common to hear on a mechanical door, I’ll say.

matches "rah rah" and "RAH RAH", but not "RAH rah", even though the original capturing subpattern is matched caselessly.

For example, the following matches "rah rah" and "RAH RAH", but not "RAH rah", although the original capturing subpattern is matched caselessly:

For example, ((?i)rah)\s+\1 matches "rah rah" and "RAH RAH", but not "RAH rah", even though the original capturing subpattern is matched case-insensitively (caselessly).

For example, ((?i)rah)\s+\1 matches "rah rah" and "RAH RAH", but not "RAH rah", even though the original capturing subpattern is matched caselessly.

matches ‘rah rah’ and ‘RAH RAH’, but not ‘RAH rah’, even though the original capturing subpattern is matched caselessly.

It goes rah rah rah, and then you hear the sound of the muffler

Yeah, it sounds like a “Rah-Rah-Rah” mantra, but it’s true.

Yeah, it sounds like a “Rah-Rah-Rah” mantra, but it’s true.

During the soccer match he moved the crowd cheering, “Rah, Rah, Rah!

It’s not the gregarious, rah-rah, type of person.

During a football game he stirred up the crowd by cheering, "Rah, Rah, Rah!

For the duration of a football sport he stirred up the crowd by cheering, "Rah, Rah, Rah!

During a football game he stirred up the crowd by cheering, “Rah, Rah, Rah!

He stood up at a football game and shouted out "Rah, Rah, Rah!