Glad to hear he got out safely.
I used to have a fake plastic vine in my tank. The links of the vine chain were plastic and slightly bigger than the width of a juvy bp head lol. Well she got her head through and slid the link down her neck where it got stuck. The area was all pink but she made a full recovery. I came home from school, freaked out momentarily, then used a knife to cut it off of her. Then i threw the vine in the bonfire later that nite lol.