Actually believe it or not I’m less scared of a syringe than an autoinjector. Why? Because in the Army we were issued an autoinjector in case of exposure to some kind of gas (I don’t remember which one) which you were supposed to inject into the muscle in your butt cheek. The scary part was how I saw one of these stick right through a 2x4 piece of wood. Imagine if you accidentally stuck your hip bone or your handowwI’ll stick with the syringe, thanks.
A single autoinjector? It was probably the ATNAA (Antidote Treatment Nerve Agent Auto-Injector). If it was a pair of them in a black sleeve, it was the Mk.1 NAAK (Nerve Agent Antidote Kit). You may have gotten a third, with diazepam, to be used to treat seizures long enough to stick the atropine and pralidoxime chloride into the victim, if they were convulsing.
The reason they give you autoinjectors, though, is because under stress fine motor skills evaporate, leaving you with gross motor skills. Using a syringe is a fine motor skill, and trying to do that while your adrenaline is spiked, you’re starting to convulse, and you’ve got a needle phobia? Sorry, you’re going to die. The military spends money on kit when the cheap gear doesn’t cut the mustard, so I’m inclined to think they switched to autoinjectors for a reason.