WGTdbloshoe: That plane ride scares me. I barely can survive 6 hours in a plane not sure how I would do with 20 hours.
Actually only about 15 to Sydney and whilst I can understand that SLF in coach struggle,,,,you will have won big so you can fly business class....just sit back and enjoy the cabin service :))
One of the safest forms of transportation, so no need for concerns.