This is a strange one for us, especially me. My 3 1/2 month old has disturbed sleep, as he kicks and moves his hands while becoming stiff, and wakes himself up.
We tried wrapping him up but he is too good at moving his hands out and again wakes himself up. This thing make his sleep disturbed, and my wife takes it that he is hungry and pulls him into our bed while feeding him but it's not enough, so this goes on throughout.
Why does he kick, move and stiffen himself? Wrapping him isn't working as he has grown too big to get wrapped in a baby blanket.