What does this joke from that '70s show mean?

Steph

Member
Two characters Hyde and Eric are at erics grandmothers funeral in Wisconsin, and the guy giving the speech about her life says "we all know she's in a better place now" and Hyde whispers to Eric "I'll tell you how to get to a better place, drive 50 miles in any direction" and Eric tells him to shut up.

So, what does this joke mean? Thanks!
 
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