Time for another round of "Mondegreen Fun" AKA "Misheard Lyrics". This one is from a song that was released in 1982 by the band Golden Earring, they are most notably known for their song "Radar Love". The song I had misheard the lyrics from is "Twilight Zone" from their album "Cut".
The real lyrics are:
"Soon, you will come to know
When the bullet hits the bone."
However, for many many years I heard the last line as "When the bullet hits the phone." Occasionally I would think that it was "Foam".