Head On is the second album by British heavy metal band Samson. It was released in 1980. The cover art features the band's masked drummer, Thunderstick. This is the first album with future Iron Maiden-frontman Bruce Dickinson on vocal duties, although some reissues of the debut do feature alternative bonus versions of songs, redone with Dickinson vocals.
The instrumental "Thunderburst" is credited as co-written by S. Harris. The track is in fact a version of "The Ides of March", an early Iron Maiden song written during the brief time in 1977 in which Thunderstick was in Iron Maiden. Iron Maiden released their own version on the Iron Maiden album "Killers" the next year, though Steve Harris credited the song solely to himself, annoying the members of Samson.