Yea that was my point. I usually nab anywhere from 1 to 6 bits of FOD during my walkaround, usually broken zipper pulls but it's included just about everything you can imagine, including drink cans that have been run over several times so it's obvious they've been on the ramp for quite a while.

A flattened soda can could easily get lifted and sucked in and would cause quite a bit of damage.