The only time I have every found a glitch in a game...

Was Super Mario Galaxy 2.

In Starship Mario, get Cloud Mario and go to the Toad Bridade ship. Do the highest jump possible and do clouds. The third cloud will be too high and will go into Starship Mario's gravity instead of Toad Bridadge ship's gravity, but you can't go on the cloud in Starship Mario's gravity because the cloud is only JUST in that gravitational pull.

It may not work for you, and it probably isn't a glitch, but it is something I discovered that is strange.