I have a card table that I put my computer on.  My son keeps putting his foot on it and I have to constantly tell him to take it down.
I have a table that is somewhat unsteady, I put my computer on there because I have no where else to put it. 
user
Have you figured out what's the problem?
assistant
I have not, it seems to do ok except when my son puts his foot on there even though I tell him repeatedly not to do that!
user
Sounds like maybe one of the legs on the table is bent? 
assistant
It could be, I just hate when he doesn't listen!
user