These remove your existing startup/shutdown animation and also remove any poweron and poweroff sounds.
Boot to recovery (TWRP) and flash.
BootUp-S5-ATT.zip, 16.3 MB, AT&T
BootUp-S5-Boost.zip, 6.9 MB, Boost Mobile
BootUp-S5-Sprint.zip, 3.8 MB, Sprint
BootUp-S5-TMobile.zip, 542 KB, T-Mobile
BootUp-S5-USC.zip, 995 KB, U.S. Cellular
BootUp-S5-VM.zip, 11.6 MB, Virgin Mobile
BootUp-S5-Basic.zip, 686 KB, Stock Samsung
BootUp-S5-Colorful.zip, 1.0 MB, "Colorful" Stock Samsung (I am unsure of where this one came from.)