Your title caught my eye from the main page, I don't usually visit this forum because my children didn't have reflux. However ,what you describe sounds exactly what my dd did for quite a few months - does it happen other than when she's feeding? I remember being a bit concerned about it but didn't get it checked out or anything. Anyway, she outgrew it maybe when she was about 10-11mths or so. I found she'd do the same thing when she learnt to stack blocks, and her arm would go in and out in and out (and hands opening and closing quite quickly) until she sussed it and then grabbed it. What I did find though is her precision when she did grab it was spot on. So although my ds would just grab and miss he didn't care, but she seemed to take her time and it was like her brain and hand were working together before actually meeting the object. I also noticed her doing it when she would reach for finger food when she was sitting on the floor opposed to in her highchair (different angle she had to look at and reach at) - it would take her about a minute to pick up a single piece of food! Anyway, I believe it's all part of the development of hand/eye co ordination. But if you do have a paediatritian appt sometime soon, I'd just bring it up to settle your fears.