Wally isn’t yanking him down on purpose here. He really thought he should climb the rope and was just making sure it was secure. Best to be safe. 
Wally and Osborne
A Webcomic about a polar bear and a penguin in Antarctica.
October 18th, 2005
oh man, this strip just made me laugh out loud in my office, i got a few wierd looks from the women accross the hall
i love this strip, it appeals to my sadistic sense of humour (i woulda tugged the rope on purpose!)
im surprised osbourne didnt get a cracked skull
yah, best to be safe.
Well I tell you i have done that before
OOO scary wally!
Wally is a lot dumber than he looks.
Even with that Swiss outfit.
ouch