What goes into the thought bubble?

[Jon Skagfeld]

Aha...Army rations...Spam, Spam, Spam, Spam, Spam (Sung by chorus of Monty Python Vikings )...or,

...so that's what a safety catch is for...or,

...I think I've got it...just snap my fingers and I've got the rhythmn for double clutching...or,

...Hi, Mom, I wuz just gonna write ya...or,

...her mother's gonna be out 'til when?...or,

...say, why don't we recruit female Brigadiers from Canada?