Axl Rose -- Dave Grohl Told Me to Sit on It!!! (PHOTO)

Axl Rose got a big assist at his Vegas concert Friday night from friend and Foo Fighter Dave Grohl.

It seems Dave loaned the GNR singer the throne he used when had a bum leg after falling off a stage last June in Sweeden. The pic (below) was snapped in November in the Netherlands, so the throne clearly has an impressive number of AAdvantage miles .

Axl ... he gets by with a little help from his friends.