I've been amused by the ice water challenge thing. Some of the videos are funny. But having briefly submerged myself in Lake Michigan in January a few times, it doesn't look like a big enough challenge!
If an ice water challenge
is what you pursue,
instead of pouring it
all over you,
jumping right in it
is what you should do,
followed by a quick run through the chilly air
trying to dry off and get clothes on before you freeze your derriere.