Riddle #2

Congratulations to davidhopkins for answering my last riddle so quickly! Here is another that you, my readers, may enjoy:

Where can you place a bookbag in a room such that it cannot be jumped over?

Again, the first person to answer correctly will recieve a congratulations and a trophy.

(A quick note: whomever answers a riddle correctly will need to accept my friend request to recieve their prize.)