"Come on. Big enough to splatter blood, But not break any windows? That's not really very big."
Would a detonator make a small explosion like that?
"My family and I were sitting at home, roughly one mile away from the stadium as a bird flies, when we heard and felt an earth shattering explosion. I was monitoring my hand held amateur radio when the local repeater erupted with chatter about a explosion. It was so loud that people wanted to know if others had heard it. I called the Police who advised me that officers were on the scene and that a explosion had occurred but they would not give any other details. Our house literally shook. The ground vibrated with a deep rolling growling sound. This was a large explosion. Not some mere Pipe bomb put together by a pissed off student."
The 2nd wave of London bombers' detonators exploded prematurely, but didn't set off the remaining charges, right?
Small enough to splatter his @zz on a bus 100 yards away?
Perspective is important. This was not 25 megatons, nor was this an M-80. Something in between. Just thinking about 50-60 Kg's of man portable go-boom.