No more babies jumping on the bed

I am one of those mom's. I left Joe on the bed for 5 seconds to get a tissue and he tried to stand up and lost his balance. He fell off and fractured his left arm. It is a small fracture on the radius ( bone aligned with the thumb). They didn't put a cast on it because of his age, the Doctor said he would heal really fast. However, we just have to watch him like a hawk and 'try' to keep him from falling on it. Try and keep a 15 month old from falling?!?! This is going to be a stressful two weeks. We go in Friday for his 15 month shots and he said if we think he needs a cast just to protect it, he will put one on... I have a feeling he is going to have a cast on his arm this weekend. Prayyyyy that he doesn't hurt it anymore or break his other arm because he can't use his left one.