Ahhhhh, I bet you had something in the passenger seat. Purse, briefcase, grocery bag? Basically when something is in the seat at a particular angle it'll switch the side airbag off, a safety feature. It happens to me when my dog is sitting in the pax seat.

Hope that helped. You can read more about it in your owner's manual, it actually covers it.

AL

'00 Insight "Wazabi" -75,000+ miles
'03 Toyota Matrix - 81,000+ miles
'03 HCH-CVT-OSBM-41,000+ miles (retired 04-10-06)
"I'm very secure with my little Insight, no Prius envy here."