The funny thing about spikes is that they're surprisingly plentiful. But where do you expect to find them?

On the floor. On the walls. On the walls that are closing in on you. On the Descending Ceiling. On the Smashing Hallway Traps of Doom. All sharp enough to impale you and leave you a bloody, shish-kabob'd hero (or at least take off a Hit Point or two...).

Appearing in more games than the barrel and the crate combined, the classic deadly spikes might just be the most widely-used videogame object ever. (It should also be noted that while crates and barrels are everyday items that most people see throughout their day, you'd have to search really hard to see a real-life death trap made of spikes.)