Car sounded like a subaru, but wait!

[daftphunk]

Sup guys, simple enough question.

Today turned my car on after sitting for about two hours. Car sounded like a Subaru, so Im thinking it's only running on three cylinders. Turn it off then back on, sounds the same. Drive down the street and it's back to normal, all 4 cylinders again.

This literally happened 10 minutes ago. Am I looking at a coil pack beginning to go out?

Had this problem last year but it was a bad coil pack and I replaced it and was good to go.

Car has been running strong and fine. Yesterday I put new plugs in, BKR7E and gapped them to 0.028 and drove around and was good to go. Drove 30 miles today, parked and came back out and it happened then disappeared.

Is this a warning sign that a pack could go out anytime now? Or am I looking at something dumb and it just happened randomly?