i was holding the dead guy up by his chest , just sort of balancing him , but i must have pushed slightly , because he fell back and slammed his head on the metal floor , hard enough to send a great bong reeling across the open land ( a brief image flashed in my head : the rank films opening , that half-naked guy striking a gong , which i always associate with the carry-on films that i so-loved to watch as a kid ) .