couple things
My stock Ranger player ate the disc like that a coupla times... here's a few things to try:
1. Power down. Disconnect battery, then reconnect. Don't ask me why, but sometimes it spits then.
2. Using el cheapo radio removal tool, take out radio unit, gently shake the unit. The cd tray/player portion of it floats on rubber suspension boots. This GENTLE jostling sometimes re-seats the cd, if its slightly off. Re-insert into vehicle, try again.
3. If worse comes to worse: Remove radio, disasseble housing. You will need a fine, small torx driver for this. Seperate the CD unit from the radio by disconnecting the small and fragile harness connecting the 2 units. Remove the housing of the CD unit, and gently extract your disk. Re-assembly in reverse order, re-insert in vehicle. Try again.
hope it helps, pm if you got questions.