 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.A jazz-style spoof version of "Vice Versa", titled "Egg Timer" and credited to Cosmo Toons and the Split Knee Loons, appears on the "For Gillan Fans Only" album, given away for free with the first 15,000 copies of Gillan's "Glory Road", released in 1980.All tracks by Bruce Dickinson, Paul Samson, Chris Aylmer and Thunderstick except "Thunderburst" by Dickinson, Samson, Aylmer, Thunderstick and Steve Harris



Charts 
UK #34



"Head On" has seen numerous CD re-issues over the years.