Are there any other occurences of blaster bolts being deflected/blocked by a Jedi/Sith/armour?
No. And, to be honest, it hadn't occurred to me to think "WTF?" about this for about a decade until this thread.
But, Yoda is shown absorbing Palpatine's force lightning more than once. Same principle?
H
P.S. Leave the scene as it is! It's cool enough already (IMHO).