Shirl wrote:

Look at the pavement behind
you when you taxi away (put it on your checklist!)...

In addition to looking for oil leaks, there are other things that you may
want to look for on the pavement behind you when you taxi: like bits and
pieces of hardware. I found that out when flying with a dude who was
checking me out on a cherokee six; the piece of hardware he spotted (and
which I missed I must confess) was one of the three bolts that held the two
halves of one of our main wheels together; could have made for an
interesting landing had he missed it.

I keep looking now :-)

--Sylvain