Overbets can work, especially in smaller pots. Over at table 4 we just witnessed a hand where with roughly 2,500 in the middle the board read 10 6 3 -K -Q on the river.
Arnar Siguedsson checked to Heikki Koskinen who in turn slid out a 3,500 bet. Siguedsson didn't take long to call. Showdown:
Siguedsson: K 9
Koskinen: A J
With his runnner-runner-straight the Fin raked in a pot worth almost 10k and is up to roughly 40k now.