He doesn't do this often but he's just done it at teatime because he got frustrated at some painting he was doing outside with my other son. Other son has some learning probs and is much younger so can be frustrating for ds1. He was really really angry and throttling himself. I reacted wrongly by getting angry too but tbh I was scared. I'm worried I've done something wrong as a parent and that's why he's like this? He's very bright and usually so easy but when he has these flare ups he's out of control.