Hi.... I know this post is a year old , but I wonder if you've got any answers to your baby's episodes. Your "supermad" description seems accurate. My 2 month old little started doing the same thing a couple weeks ago. While in a slightly laid down position, suddenly goes completely stiff, arms bent, fists by face, and turns bright red. She also makes a sudden grunting cry. It's as though she is in extreme pain or extremely mad. It's not the exaggerated Moro reflex because her arms do not go out straight (although she does do that during late night diaper changes if she hasn't woken up fully yet).
It's extremely scary and it seems like she's having a seizer or about to give herself an aneurism. When i pick her up her body is as sriff as a board. It only lasts 5 to 10 seconds, but then cries afterward.View Thread