Waking up at 3am to one of your dogs (Eddie, in this case) reverse sneezing right next to you. Thankfully he calmed back down quickly but damn I had forgotten how horrific that sound can be!
The first time one of mine did it, it was Georgie right as I was leaving for work...I thought she was having a f'ing seizure or something. I texted my vet at the time in a panic (she and I were friends before she was my vet) and she told me to google reverse sneezing, watch one of the videos that popped up, and tell her if that's what Georgie was doing. Sure enough, that was exactly it. Now we just pet whoever the culprit is and stay calm so they can relax, but damn that is not a sound to wake up to at 3am.