I will agree, if you try to use ANY other macro mid count-down it will stop. However here is mine, might help and its a good time if you have a ninja in your party.

/p Pulling in 15 <se.10>
/wait 5
/p Pulling in 10 <se.10>
/wait 5
/p Pulling in 5 <se.10>
/wait
/p Pulling in 4 <se.10>
/wait
/p Pulling in 3 <se.10>
/wait
/p Pulling in 2 <se.10>
/wait
/p Pulling in 1 <se.10>