actually lets the scene play, he watched it straight for four hours. >> reporter: and nick has another common autistic trait, severe obsessive compulsive disorder. >> reporter: i saw him walking through a room. and he walked only on the edge of the room. >> he's developed a very, we call it choreography. it could take him two hours sometimes to cross a room. it's painful to watch. >> reporter: nick needs individual attention that's hard to provide in a classroom. so his local school district sends aides to work with him one-on-one at home. but like eric, nick's 21st birthday is around the corner. they'll both abruptly lose the services that have helped them come so far. >> is it cruel to offer something and then have it taken away? but it's even crueler not to offer it in the first place. and i don't know what the answer is. and in 40 some odd weeks from