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103. Dress up as Tony the Tiger, and chase people around Walmart. (I actually saw this happen once... )

104. Give out samlpes of steak, only after people eat it tell them it's Target steak. (from the Walmart commercial )

105. walk around stabbing people with those fake knives whose blade looks steel but is made of rubber and poke it into peoples stomach

106. Inflate a kiddie pool, put it in the middle of the clothing section, steal a bunch of big water containers, fill the pool, climb onto a clothing rack, and jump into the pool.
107. Host a big cosplay party.

death_owl wrote:105. walk around stabbing people with those fake knives whose blade looks steel but is made of rubber and poke it into peoples stomach

Training knives you mean?

sure...

108. Find an old coupon book, and purchase everything in it. After it's all been ringed up, show the cashier the book. When he/she says that it's expired, just say okay and walk away.

109. run around walmart while holding a string attached to a kite

110. Dump massive amounts of ammonia and bleach on the floors
111. Bring blocks of sodium and drop them in the toilet, shouting "UHHHH!!! That was a good crap!"
112. Obviously burn the building down
113. Argue with the cashiers that the prices are too high, refuse to leave
114. Eat all the cosmic brownies
115. Put on a ski mask and shoot people with a nerf gun, if they don't give you their money
116. Let off bottle rockets and hit people in the aisles
117. Over pump the bicycle tires until they pop
118. Say into the intercom, man shot in aisle 9
119. Break the cases with the games in them, and fill them with molasses or something else sticky
120. Run around naked, screaming "The sky is falling!"

121. Freeze all the Mentos, and put them in the Coke bottles.