Not sure I am in the right category forum or anything but have concerns and looking for some direction. I am proud father of beautiful 3 year old boy. He was product of uncomplicated pregnancy, full term, vaginal birth, 10# 8oz. at birth, all milestones met, has been developing "fine" is big 50# but solid even though only 3, he has well developed language skills, is socially active , somewhat shy but not out of the ordinary, has developed fine motor skills for his age, has received all immunizations until we broke off in the midst of H1N1 vaccinations after concern last 3-4months of the following: at times, sometimes when over excited or over tired but not always the case he does the following - all of a sudden while playing he may stand up almost on tip toes, arch back slightly , mouth usually opens and hands shake or waive at side this happens for 10-20 seconds then he goes back to whatever he was doing in an average day may happen handful of times on occasion it has happened 6-8 times in a day, when ask him if he is okay he sometimes responds "I was catching my breath" almost seems seizure like, he is doing well in pre-school teacher says she has not noticed this behavior , pediatrician says he is "fine" I am concerned , any thoughts , do I seek pediatric neurologist evaluation or what ?