A disposable camera doesn't have to reload 3 times to take 30 shots.
There aren't any dead babies at the Cincinnati Zoo.
There's no way Eric Clapton would let a bag of cocaine fall out of a window!
The mathematician says "2" The Physicist says "2, plus or minus 0.1" The engineer says "Probably around 2, but let's say 3 to be on the safe side".
The finish line at the Boston Marathon.
Once more into the breech, dear friends
Please Get Out The Pool"
30 because that's peasants work.