[Maulik]

benz,

when you bet small on the river its a blocker with the intention of:
a) receiving a cheap showdown
b) inducing a shove
c) or folding

you don't want to fold because his hand looks like a bluff check-raise. He c/r the flop, didn't lead turn when presumably his Ace high flush draw got there and finally when the four [img]/images/graemlins/club.gif[/img] falls he's shoving or missing value.