I had what appeared to be a 3-yr-old Tom slip in behind me yesterday @ 2pm.
A crow landed nearby and cawed loudly, to which the Tom then shock gobbled about 10 yards behind my position. Right after he gobbled, he spit once, then started to drum, but never any more than that once.
Many just don't drum, some do, some do a lot.
As to this one yesterday, I think he knew something just wasn't right, possibly why he "slipped" in so quietly without my hearing him in dry hardwood leaves.
I had called him up from a considerable distance, but only yelped following what began as his "free" mid-day gobbles. Last time he gobbled, he was too close (and behind me) for me to respond (or move) in any way. Time before that, he was probably 200-plus yards away in a hardwood bottom. Somehow, he circled in behind me, as though he had exactly pin-pointed where those yelps had come, even from several hundred yards away.
I believe when he 1st responded, he had to be over 450 yds away, due to such a heavy tangle of young pines & briars between us, which he could not travel thru.
But seems like, most that come in like this one, often do drum, which is how I know they're coming. This one was exceptionally stealthy, and if that crow hadn't cawed, I'd likely have never known Mr. Tom was standing only a few feet behind me.