[Clock King]

So, in a crowded sports event, there’s a pot with a timer ticking down and nobody notices?

[ArrogantBustard]

So, in a crowded sports event, there’s a pot with a timer ticking down and nobody notices?

So, in a crowded sports event, there's a pot inside a backpack, with an electronic timer that doesn't tick, and nobody notices?

[VanDeKoik]

A watched pot never boils....or explodes?

[corlorde]

They aren’t big, and you could have two. One in a backpack, and you could have another bag that you are carrying. The bags could say, “Boston Marathon Equipment” on the outside, and no one would look at you twice.

[demshateGod]

It was in a trash can. They probably ran all the bums out, as liberal cities always do before big events.