3 handed
Payouts as follows
£3500
£2000
£1250
There is a £1000 GUKPT seat to the winner too
All three chip stacks are 500,000
blinds are 8000/16000/1000 on a 45 minute clock, mid level
Button, the tightest player of the three but unlikely to make many mistakes. Folds
Small blind raises to 42000 with

Big blind, long time chip leader with a very LAGgy game, constantly pressuring and never backing down, shoves for 500,000
As the Small blind you do what?