Greeting! I'm a freshly minted DPT, so I don't have any ED patients. However, I do have some stories to tell:
1. From my old EMT roommate: Scumbags still care about their mothers, and will ask why you're paying more attention them instead of her. Amazing, considering he's the one who stabbed her 7 times in the middle of the street, then himself 4 times, then lit himself on fire.
2. From my brother's co-worker: it's entirely possible to nail your testicle to a 2x4 with a nail gun. Not just the scrotum though - it actually went went through the testicle.
Additionally, it's apparently easy to get your STD's from a toilet seat, but never from your cheated-on-you-twice-that-you-know-of girlfriend.
3. From my friend's uncle: Sudden onset abdominal pain during a family Christmas gathering is indeed a reason to go to the ED. You'll make the doctor's night when he gets to ask "Well, Mr. _____, has anyone ever told you that your full of crap?" He'll then show you the x ray showing a large amount of constipation.
4. From my mother (a chiropractor): Pt comes in, CC L-sided CP with radiation to the L jaw and arm. Mom: "You have 30 seconds to tell me why you aren't in the ER." Apparently, the lady had already been. Had been in the hospital for a week. EKG clean, blood clean, MRI clean, and had been seen by multiple specialists, DC home with an appointment for parasitologist consult the next week. In the meantime, pt decided to see a chiropractor on the off chance the they could help.
On palpation, Mom found the sternal costal joint the lady had somehow injured while stretching. No one at the hospital thought to palpate her ribs, since it was so obviously a heart problem. No one is perfect, and simple things can be missed by multiple people.
5. Finally: a 6 year old kid, after taking a header (actually, a chinner) onto solid granite, can hike 5.4 miles from the top of Nevada Falls in Yosemite back to the Ranger station with no problem, but will whimper like crazy when they put the needle in to give him a local. I now have a cool scar and a good story.