I once threw a grenade at a tree and bounced off and blew me up.
This dream may suggest that the dreamer has unresolved anger or frustration towards something or someone. The act of throwing a grenade could symbolize a desire to express that anger or frustration in an explosive or destructive manner. The fact that the grenade bounced off and blew the dreamer up may indicate that this desire to act out in anger will ultimately result in negative consequences for the dreamer. It may be beneficial for the dreamer to identify any underlying issues that are causing this frustration and seek healthy ways to address and resolve them.