We'd rather they were pelting them at each other but we'll take what we can get.
'Egg Russian Roulette' sounds like the sort of juvenile game that people with too much time on their hands and too many eggs to waste come up with and that seems to fit this bill precisely.
And it looks like this game may be Neil Patrick Harris' 'Knifey Spoony' because he appears to be an actual wizard at it. Jimmy Fallon, not so much.