rendered paste body| id | text | parent_id |
=============================================
| 1 | Blah | 0 | Root Comment
| 2 | Blah | 0 | Root Comment
| 3 | Blah | 1 | Child of 1st comment
| 4 | Blah | 1 | Another Child...
| 5 | Blah | 3 | etc...
and then i delete for example comment with id 1:
| id | text | parent_id |
=============================================
| 2 | Blah | 0 | Root Comment
| 3 | Blah | 1 | Child of 1st comment
| 4 | Blah | 1 | Another Child...
| 5 | Blah | 3 | etc...
and i'm left with 3,4,5 orphans, i hope you understand what i mean now :)