At the Silver Legacy in Reno, NV, last month, I plunked $3.50 in a PENNY slot: "Invaders Return from the Planet Moolah" - one of my favorites just for the name, graphics and sounds ("Moooo!"). After a few plays, I hit the big bonus...200 free spins (with added bonuses to total 275!)...and ended up with a payout of $1622.00 - from a PENNY SLOT!
I guess you could say I really MILKED those alien cows!!
(No cows were tipped or harmed in the game!)