I'm stuck near the end of "Joke's End", level 5 I believe. I've read a
walkthrough, which doesn't help me. I'm in the room with a barrel
(used to get some hoo beans - I've already done this). There is an
exclamation block that when hit triggers the very brief appearance of
a bridge.

I can't seem to find a way of getting across the bridge. The
walkthrough says "line up just below the short iceblock to the
southeast of the Exclamation block" - how can you do this, you can't
hit the exclamation block from here.

What is the fastest way across this room?

Thanks for any help

Malcolm