Food Poisoning

Oh My God! I went home yesterday to find that my family are all feeling not too well... My youngest sister even puked throughout the night! What have we eaten that's causing this? Is it my fault to bring them all to Sizzler for sunday's dinner??? I'm just trying to celebrate Lao Pa's birthday together~ and I also happen to have 3 for price of 2 vouchers for Sizzler that's all... (^_*)V Maybe it's the fruits that's been left at the salad bar for a day long when we went for dinner.

P/S: I didn't take any oysters!