autism and mood swings? Normal?

My son is 9 and 1/2 years old we got the autism diagnosis when he was just a little per a year old. It seems the older he gets the more intense his mood swings are becoming. No exaggeration he will go from laughing like crazy to crying like he's very depressed and back to laughing again all within just a minute or so. With no visible signs of anything around him causing him to start crying or laughing. He's non verbal and I kno a lot of behavior stems from that but the mood swings seem very intense I'm just wondering if any other parents or caregivers of people or children with autism notice mood swings like this? Is it normal for him to have these mood swings? His autism is more on the severe side.