Sounds like it was "your mate" that didnt think real hard before accepting...
Whilst I havent read the Tiger contract, for some guys to turn down a what is most likely their first jet gig speaks volumes to me about the offer.
Hope he likes the idea of getting shafted to Singers at a moments notice and then not being able buy a house and take advantage of low interest rates nowadays 'coz the bank doesnt like the "unnotified unpaid leave" clauses in his contract. Sounds like your mate got the jump on those other fellas alright!