Occasional slight "buck" / "miss"
 

As I cruise down the highway in my 2011 Civic EX coupe, every once in a while (maybe twice on my 20 mile highway run to work) I get this very mild little "buck" or what seems like a "miss". It goes away as quickly as it shows up. No engine light. At 65k I'm sure I'd be justified changing the coils and plugs, and I'd eliminate that possibility. I only notice it as I'm cruising on the highway and no other time. Always starts and idles fine and consistently. It seems like something electrical is failing very briefly, so maybe it is one of the ignition coils. Thoughts or experiences appreciated.

Re: Occasional slight "buck" / "miss"
 

Test coils before blindly replacing.
With engine idling slightly lift coil from spark plugs and listen for spark..lifting further from coil should cause drop in idle.
Do all four one at a time.