I think the bird was in fact his sister, the bird said that his sister was down in the basement and then said it lied. Maybe because his sister was with him all along and that the basement (at least the inner parts) was his heart and that his sister was always be in his heart and that she is very dear to him. His sister was the hope and will to live and the key to wake up from the coma. The people he met was people he knew, Jon and Goomboysa was friendds he knew aswell as Fatty fatcake. Fatty was a friend that often blocked his path but Pete helped him when he was in trouble and in return Fatty would help him. His father wasn't abusing but rather urged him on to keep doing what was right and solve the problem, or it would just be worse later. And the reflection in the water in the basment is a reflection of the reality with a person dear to him watching as he lays on the bed. The bell is probably just some distorted sounds around him as he wakes up.
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