[rigelkentaurus]

Hmmm - smoke in the lavatory? Sounds like a bomb to me.

[shelterguy]

Just some hippy torching a fatty. Certainly not muslim terrorists.

[Calvin Locke]

Perhaps the emergency O2 generators went amuck?

[Vermont Lt]

Thermite. It would be easy to bring on a plane. A strip of magnesium tape could light it.

[njslim]

Unfortunately probably somebody sneaking a smoke in the bathroom and then throwing it away in garbage bin.....