Rabies vaccine reaction

Magic, one of our minis, had a pretty scary reaction to his rabies vaccine a couple of weeks ago. I've never had a reaction from anyone here, so you can imagine this was pretty darn scary for me. Here's a video.... I'll admit I'm going to be quite nervous at vaccination time from now on....with everyone! No fever, just swelling near the injection site and this walking issue which lasted a couple days. Thankfully he was in good spirits through it all. More than I can say for myself! Nine in all were vaccinated (7 horses and 2 donkeys) and he was the only one to get this type of reaction.