Question: How can I use try-catch within a procedure correctly?

Hello

Although I have read the help file on how to use try-catch commands, I am not sure how they work exactly.  Here is an example of how I used them. (It is just a pseudocode).

myrout:=proc(arg1,arg2,arg3,args4,arg5)
try 
   .....
   timelimit(...)
   if condition then 
      ....
   else 
      timelimit(...)
      .....
   end if:
catch "time expired":
    return([a,b,c,d]):
finally
    .......
end try:
return([res1,res2]):
end proc:

Questions:

1) Does catch catch "time expired" from both calls of timelimit?  

2) Will the set of sequences under finally be executed when a "time expired" is caught? Somehow reading the help file i had the impression that it will.  If that is the case, how can it be avoided?  

Many thanks

Ed