Ryan does it a lot , he sleeps sitting up for a long time ,if I go up to check and find him like that then I just gently lay him down .I used to think it was comfier for him being a refluxer and that's why he did it . I was a sleep walker and still am a sleep talker .Ryan went in a big bed at 15 months and with a bed guard he has never fallen out , I have all aroundhim padded to incase he throws himself at the wall side .DP laughs cos it looks like a padded cell but trust me he needs the padding