Thanks to bartimaeu2s for pointing out the way John is rubbing his left hand here. So what might we deduce about this?
Well, the first thought that comes to mind is that it’s John’s ring hand. He’s only been wearing his wedding band for a few hours now, so he’s highly aware of it.
But this is also John’s “intermittent tremor” hand. Click on that link and you’ll see just how often Martin incorporates this particular character tic into his performance. You see it when John is feeling vulnerable. And here, seated next to his new wife, near the end of Sherlock’s speech, John seems to be really feeling it. So much so that it’s not an unconscious twitch, but something he’s so aware of, he’s trying to massage it out.
This directly follows Sherlock dropping his champagne glass, so it’s hard not to get sucked into his POV, particularly since he spends an extended period of time in his MP. But for everyone else, this all passes by in a few seconds. Let’s back up and take a look at what’s going on from John’s POV.
"Today begin the adventures of Mary Elizabeth Watson and John Hamish Watson."
Does anyone see joy or excitement there? I see a man bracing himself, eyes full of uncertainty. And let’s not forget his discomfort with his middle name (just one of a few secrets John would prefer to stay secret, sexy. *wink*).
"The two reasons why every one of us is…here today."
(Can’t overlook the symbolism here – raising a glass to toast a marriage only to have the glass shatter. Slipping this into my increasingly large “proof the Watsons are doomed” file.)
Sherlock is visibly flustered as he accepts a new glass and tries to get back on track while Mycroft is still in his mind, telling him something is going to happen. Here’s the next time we see John, who (like everyone else in the room) is wondering what the hell is going on with Sherlock right now.
Hang on, look closer…
Either John’s playing table spider, or the tremor’s already bothering him. So in the last 10ish seconds, Sherlock has announced Mr. and Mrs. Watson for the first time, John visibly displayed signs of uncertainty and fear, Sherlock became so unhinged he dropped his champagne glass, and now John’s so-called “post traumatic stress” tremor is back.
(Is anyone really still on Team Platonic? I just…anyway.)
Remember, no one in the room knows that Sherlock is trying to figure out the Mayfly Man mystery right now, including John. To them, Sherlock’s just acting kinda batshit. Well, more so than usual. Next, he tells the room he’s just asked to stand, to sit back down.
"And down again…"
This is beautiful. Mary and Janine both stare out at the crowd with similar WTF expressions, and Janine hesitates before starting to sit.
John literally bows his head with Sherlock’s hands like a goddamn puppet. Doesn’t matter what the reason, doesn’t matter how bizarre the order, John just does what Sherlock says. For fuck’s sake, John wasn’t even standing to begin with, and he still “obeyed,” bowing his head and lowering his eyes as if in prayer.
"Ladies and gentlemen, people tell you not to milk a good speech."
Can’t see John’s hand…but Sherlock clenches his.
"Get off early, leave ‘em laughing…"
John glances at Mary, insert joke about getting off here, still can’t see John’s hand but it must be bothering him because—-
"Wise advice I’ll certainly try to bear in mind, but for now…Part Two!"
—-he starts to massage the tremor out.
"Part Two’s a bit more action-based. I’m gonna walk around, shake things up a bit."
Part two. The next chapter. A bigger adventure, a new, unbroken glass, massaging the tremor out, facing fears and uncertainties, shaking things up – that’s where we’re heading now.
Could be all over-analyzation, all coincidence. But we all know what Mycroft would say to that. ;)
HAHAHAHAHA oh my gosh ~♥