This can also do in tires....
"Jumping" Cholla cactus - sharp, and with nasty barbs on the ends. The spines are 1 to 2 inches long, and the plants can shed small "chunks"... these are attracted to folks wandering by, and always seem to get you... hence the term "jumping"....
Though I missed the best photo when my camera wasn't handy....
One day, on opening our garage door, my Lycoming O-320-E2G was sitting up front, wrapped in plastic and guarded by two curled up rattlesnakes on top of the engine....
Would have made a great photo.....
Gil in Tucson ... and guess where our airpark got it's name from...
And for Alex C. from his Mojave days...
Duster A3
Mini-Nimbus ACE