"In the Back of My Mind" as a set opener

[RockyRaccoon]

I was looking at some old setlists and was really surprised that by the end of the 1990 tour, the band would open with "In the Back of My Mind". Really odd and bold choice, it was a new song and not really a hit, it had Billy (still a relative newcomer to the band) as the primary vocalist, and it's a slower number too, much different in tone from previous openers like "Say You Love Me", "The Chain", "Second Hand News", or "Monday Morning". I'm wondering, if you were at any of those shows, how did that go down with the audience? Did it work as an opening number?