my iphone 3g is stuck on reboot/respring loop HELP!

[iSmoke]

I respringed my iphone 3g (its jailbroke) and i downloaded a font from cydia and when i had to respring it it jus got stuck in a loop and kept vibrating every so often untill the battery died (it was fully charged) so when it finally died ii tried turning it on and its stuck in respringing still and donest turn on it just shuts off. does anyone know how i can fix this.....i really dont wanna restore it

[iYeow]

Unless you can ssh or go to cydia and uninstall it, you may need a restore