Rolls on C natural

I recently got The Complete Irish Tinwhistle Tunebook by L.E. McCullough and i have to say it is a wonderful book. Especially for people like me who learn both by ear and by music. When anyway i was trying to learn this jig called Bímíd Ag ól( anyone who knows how to pronouce please tell me) and in the recording L.E. rolls on a C natural. ANyone know how to do this?
Andrew Cassidy

P.S. Posting this both on the flute and the tin whistle board

try

OXX XOX
OXX XXX
OXX XOX
XXX XOX
OXX XOX

or

OXX XOX
XXX XOX
OXX XOX
OXX XXX
OXX XOX

also

OXX OXX
OXX XXX
OXX OXX
XXX OXX
OXX OXX


and

(a bit tricky)
OXX OOX
OXX XXX
OXX XOX
OXX XXX
OXX XOX

and this brings us to the next

OXX OOO
OXX XXX
OXX OXX
OXX XXX
OXX OXX

finally, my method

OXX XOX
(imagined cut: oxx xxx)
OXX OXX
(imagined tap: oxx xxx)
OXX XOX