Accountants who play 'chicken' in January

I first came across this concept many years ago:

An accountant told me that they play a version of Chicken each year as an incentive to get all of their clients' tax returns in on time. 

They said they always leaves their own tax return to be the last one filed by their practice each January.  And that, on one occasion they did this at 23:59!

Does anyone else play daft games like this at year end?