It’s Day One at the ACEP annual meeting and if you have Twitter, your phone is probably blowing up with #ACEP15 news and a mountain of great educational pearls.

If you don’t have Twitter but want to know what is happening in every room of this mega-conference other than the one you’re currently in, here’s a quick round up of top tweets from some of the most influential emergency medicine tweeters at this year’s annual meeting.

In just the first few hours of the conference, well over 4,000 tweets were posted. (It still boggles my mind that in 2012, fewer than 1,500 tweets were posted the entire week!)

This year, Drs. Rick Bukata and Jerry Hoffman continued their annual popular session “Clinical Pearls From the Recent Medical Literature.” Dr. Salim Rezaie (@srrezaie) tweeted a key take-home message from one study they featured (Kanzaria HK, Hoffman JR, Probst MA, et al. Emergency physician perceptions of medically unnecessary advanced diagnostic imaging. Acad Emerg Med. 2015;22:390-398.). “Why do EM Docs Order Unnecessary Tests? Top 2 Reasons: 1. Don’t Want to Miss Dx 2. Don’t Want to Get Sued.”

Interestingly enough, Jerry and Rick threw some complexity on the picture, citing a New England Journal of Medicine paper (Waxman DA, Greenberg MD, Ridgely MS. The effect of malpractice reform on emergency department care. N Engl J Med. 2014;371:1518-1525), that surprisingly found that litigation reform did not change rates of advanced imaging or hospital admission in three states. And in case you’re wondering, yes, the hashtag #Hofkata seems to have survived from 2014.

Pulmonary embolism research superstar Jeff Kline (@Klinelab) gave a well-attended session entitled “A Commonsense Approach to ED VTE.” Not only does Costa Rica emergency physician Manrique Umana attend ACEP just about every year, he’s reliably excellent for high yield tweets (Follow him!). Here’s his succinct summary of Kline on risk assessment: “VTE approach: Regarding VTE pretest probability: Gestalt = Wells = Geneva.”

Dr. David Callaway’s session “That Wasn’t a Firecracker: There’s an Active Shooter in the Hospital” was a harrowing talk on an important topic we all wish were not necessary. Sad but true, but this situation is more likely than an Ebola exposure. From Dr. Sean Fox (@PedEMMorsels): “Metal detectors in the ED decrease the number of weapons, but [do] not decrease number of assaults.” Finally, winning the award for Twitter-pearl-I-hope-none-of-us-ever-has-to-see, from @HenryFordEM: “Active shooter lecture: great door barricade is stretcher pushed up against door and wheels locked.”