Simple Jetpack Crash

java.lang.ClassCastException: net.minecraft.entity.monster.EntitySkeleton cannot be cast to net.minecraft.entity.player.EntityPlayer
	at tonius.simplyjetpacks.item.ItemSJJetpack.useJetpack(ItemSJJetpack.java:136)
	at tonius.simplyjetpacks.event.JetpackMobHandlers.makeMobUseJetpackRandomly(JetpackMobHandlers.java:24)
	at net.minecraftforge.event.ASMEventHandler_180_JetpackMobHandlers_makeMobUseJetpackRandomly_LivingUpdateEvent.invoke(.dynamic)
	at net.minecraftforge.event.ASMEventHandler.invoke(ASMEventHandler.java:39)
	at net.minecraftforge.event.EventBus.post(EventBus.java:108)
	at net.minecraftforge.common.ForgeHooks.onLivingUpdate(ForgeHooks.java:337)
	at net.minecraft.entity.EntityLivingBase.func_70071_h_(EntityLivingBase.java:1776)
	at net.minecraft.entity.EntityLiving.func_70071_h_(EntityLiving.java:257)
	at net.minecraft.entity.monster.EntityMob.func_70071_h_(SourceFile:29)
	at net.minecraft.world.World.func_72866_a(World.java:2350)
	at net.minecraft.world.WorldServer.func_72866_a(WorldServer.java:719)
	at net.minecraft.world.World.func_72870_g(World.java:2311)
	at net.minecraft.world.World.func_72939_s(World.java:2157)
	at net.minecraft.world.WorldServer.func_72939_s(WorldServer.java:550)
	at net.minecraft.server.MinecraftServer.func_71190_q(MinecraftServer.java:668)
	at net.minecraft.server.dedicated.DedicatedServer.func_71190_q(DedicatedServer.java:276)
	at net.minecraft.server.MinecraftServer.func_71217_p(MinecraftServer.java:587)
	at net.minecraft.server.MinecraftServer.run(MinecraftServer.java:484)
	at net.minecraft.server.ThreadMinecraftServer.run(SourceFile:583)