There are some very cool behind the scenes on how they did that stunt, on YouTube.
Looks like they used a ramp to make the jump and then used CGI to put the steps back in:
I think Zack and Ari's re-enactment kills it.I cannot freaking believe you guys left out the most epic bike scene of all time from "Dumb and Dumber".
one ton + 5 is my limit....Burt does it... (actually I worked with a feller wot was actually ather in real life and was acquainted with the Burtster.... said he was insane, but nice fella...