Trust me buddy, unless you claim the Water is over 20 feet I will believe you.
Liasis grow like weeds, My girl (Olive) just turned 2 and she is already 6 kilos and pushing 9 feet.
She still has plenty more growing to do...
Any snake with large parents, that lives in near perfect conditions
with huge amounts of food will ultimately turn out quite large...
I think genetics also has alot to do with final adult size; I'm yet to see an Alice springs Mulga over 1.6M, but have seen plenty of Kimberley Mulgas over 2M!